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The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
. It is a
federal republic A federal republic is a federation of Federated state, states with a republican form of government. At its core, the literal meaning of the word republic when used to reference a form of government means a country that is governed by elected re ...
of 50
states State most commonly refers to: * State (polity), a centralized political organization that regulates law and society within a territory **Sovereign state, a sovereign polity in international law, commonly referred to as a country **Nation state, a ...
and a federal capital district,
Washington, D.C. Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...
The 48 contiguous states border
Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
to the north and
Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...
to the south, with the semi-exclave of
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
in the northwest and the
archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands. An archipelago may be in an ocean, a sea, or a smaller body of water. Example archipelagos include the Aegean Islands (the o ...
of
Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...
in the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...
. The United States asserts sovereignty over five major island territories and various uninhabited islands in
Oceania Oceania ( , ) is a region, geographical region including Australasia, Melanesia, Micronesia, and Polynesia. Outside of the English-speaking world, Oceania is generally considered a continent, while Mainland Australia is regarded as its co ...
and the
Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America ...
. It is a megadiverse country, with the world's third-largest land area and third-largest population, exceeding 340 million. Its three largest metropolitan areas are
New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...
,
Los Angeles Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...
, and
Chicago Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...
, and its three most populous states are
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
,
Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
, and
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
.
Paleo-Indians Paleo-Indians were the first peoples who entered and subsequently inhabited the Americas towards the end of the Late Pleistocene period. The prefix ''paleo-'' comes from . The term ''Paleo-Indians'' applies specifically to the lithic period in ...
migrated from North Asia to North America over 12,000 years ago, and formed various civilizations. Spanish colonization led to the establishment in 1513 of
Spanish Florida Spanish Florida () was the first major European land-claim and attempted settlement-area in northern America during the European Age of Discovery. ''La Florida'' formed part of the Captaincy General of Cuba in the Viceroyalty of New Spain, and th ...
, the first European colony in what is now the continental United States. Subsequent British colonization, with the first settlement of the
Thirteen Colonies The Thirteen Colonies were the British colonies on the Atlantic coast of North America which broke away from the British Crown in the American Revolutionary War (1775–1783), and joined to form the United States of America. The Thirteen C ...
in
Virginia Virginia, officially the Commonwealth of Virginia, is a U.S. state, state in the Southeastern United States, Southeastern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States between the East Coast of the United States ...
in 1607, saw these colonies expand.
Forced migration Forced displacement (also forced migration or forced relocation) is an involuntary or coerced movement of a person or people away from their home or home region. The United Nations High Commissioner for Refugees, UNHCR defines 'forced displaceme ...
of
enslaved Africans Slavery has historically been widespread in Africa. Systems of servitude and slavery were once commonplace in parts of Africa, as they were in much of the rest of the Ancient history, ancient and Post-classical history, medieval world. When t ...
provided the labor force necessary to make the plantation economy of the
Southern Colonies The Southern Colonies within British America consisted of the Province of Maryland, the Colony of Virginia, the Province of Carolina (in 1712 split into North and South Carolina), and the Province of Georgia. In 1763, the newly created colonies ...
economically viable. Clashes with the
British Crown The Crown is a political concept used in Commonwealth realms. Depending on the context used, it generally refers to the entirety of the State (polity), state (or in federal realms, the relevant level of government in that state), the executive ...
over taxation and the denial of parliamentary representation sparked the
American Revolution The American Revolution (1765–1783) was a colonial rebellion and war of independence in which the Thirteen Colonies broke from British America, British rule to form the United States of America. The revolution culminated in the American ...
, with the
Second Continental Congress The Second Continental Congress (1775–1781) was the meetings of delegates from the Thirteen Colonies that united in support of the American Revolution and American Revolutionary War, Revolutionary War, which established American independence ...
formally declaring independence on July 4, 1776. Victory in the 1775–1783 Revolutionary War brought international recognition of U.S. sovereignty, and the country continued to expand westward across North America, resulting in the dispossession of native inhabitants. As more states were admitted, a North–South division over slavery led to the secession of the
Confederate States of America The Confederate States of America (CSA), also known as the Confederate States (C.S.), the Confederacy, or Dixieland, was an List of historical unrecognized states and dependencies, unrecognized breakaway republic in the Southern United State ...
, which fought the Union in the 1861–1865
American Civil War The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
. With the victory and preservation of the United States, the newly passed Thirteenth Amendment freed many slaves. By 1900, the country had established itself as a
great power A great power is a sovereign state that is recognized as having the ability and expertise to exert its influence on a global scale. Great powers characteristically possess military and economic strength, as well as diplomatic and soft power ...
, a status solidified after its involvement in
World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
. Following
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
's
attack on Pearl Harbor The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Empire of Japan on the United States Pacific Fleet at Naval Station Pearl Harbor, its naval base at Pearl Harbor on Oahu, Territory of ...
in December 1941, the U.S. entered World War II. Its aftermath left the U.S. and the
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
as the world's
superpowers Superpower describes a sovereign state or supranational union that holds a dominant position characterized by the ability to exert influence and project power on a global scale. This is done through the combined means of economic, military, tec ...
and led to the
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
, during which both countries struggled for ideological dominance and
international influence In the field of international relations, a sphere of influence (SOI) is a spatial region or concept division over which a state or organization has a level of cultural, economic, military, or political exclusivity. While there may be a formal a ...
. The Soviet Union's collapse and the
end of the Cold War End, END, Ending, or ENDS may refer to: End Mathematics *End (category theory) * End (topology) * End (graph theory) * End (group theory) (a subcase of the previous) * End (endomorphism) Sports and games *End (gridiron football) *End, a division ...
in 1991 left the U.S. as the world's sole superpower. The U.S. national government is a
presidential Presidential may refer to: * "Presidential" (song), a 2005 song by YoungBloodZ * Presidential Airways (charter), an American charter airline based in Florida * Presidential Airways (scheduled), an American passenger airline active in the 1980s * ...
constitutional A constitution is the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organization or other type of entity, and commonly determines how that entity is to be governed. When these princ ...
federal republic and
liberal democracy Liberal democracy, also called Western-style democracy, or substantive democracy, is a form of government that combines the organization of a democracy with ideas of liberalism, liberal political philosophy. Common elements within a liberal dem ...
with three separate branches:
legislative A legislature (, ) is a deliberative assembly with the legal authority to make laws for a political entity such as a country, nation or city on behalf of the people therein. They are often contrasted with the executive and judicial powers ...
,
executive Executive ( exe., exec., execu.) may refer to: Role or title * Executive, a senior management role in an organization ** Chief executive officer (CEO), one of the highest-ranking corporate officers (executives) or administrators ** Executive dir ...
, and
judicial The judiciary (also known as the judicial system, judicature, judicial branch, judiciative branch, and court or judiciary system) is the system of courts that adjudicates legal disputes/disagreements and interprets, defends, and applies the law ...
. It has a
bicameral Bicameralism is a type of legislature that is divided into two separate Deliberative assembly, assemblies, chambers, or houses, known as a bicameral legislature. Bicameralism is distinguished from unicameralism, in which all members deliberate ...
national legislature composed of the
House of Representatives House of Representatives is the name of legislative bodies in many countries and sub-national entities. In many countries, the House of Representatives is the lower house of a bicameral legislature, with the corresponding upper house often ...
(a
lower house A lower house is the lower chamber of a bicameral legislature, where the other chamber is the upper house. Although styled as "below" the upper house, in many legislatures worldwide, the lower house has come to wield more power or otherwise e ...
based on population) and the
Senate A senate is a deliberative assembly, often the upper house or chamber of a bicameral legislature. The name comes from the ancient Roman Senate (Latin: ''Senatus''), so-called as an assembly of the senior (Latin: ''senex'' meaning "the el ...
(an
upper house An upper house is one of two Legislative chamber, chambers of a bicameralism, bicameral legislature, the other chamber being the lower house. The house formally designated as the upper house is usually smaller and often has more restricted p ...
based on equal representation for each state). Federalism provides substantial autonomy to the 50 states. In addition, 574 Native tribes have sovereignty rights, with 326 reservations composing
Indian country Indian country is any of the self-governing Native American or American Indian communities throughout the United States. Colloquially, this refers to lands governed by federally recognized tribes and state recognized tribes. The concept of tri ...
. American values are based on a democratic political tradition that draws its inspiration from the European Enlightenment movement. Since the 1850s, the Democratic and Republican parties have dominated
American politics In the United States, politics functions within a framework of a constitutional federal republic, federal democratic republic with a presidential system. The three distinct branches Separation of powers, share powers: United States Congress, C ...
. A
developed country A developed country, or advanced country, is a sovereign state that has a high quality of life, developed economy, and advanced technological infrastructure relative to other less industrialized nations. Most commonly, the criteria for eval ...
, the U.S. ranks high in economic competitiveness,
productivity Productivity is the efficiency of production of goods or services expressed by some measure. Measurements of productivity are often expressed as a ratio of an aggregate output to a single input or an aggregate input used in a production proce ...
, innovation, and higher education. The U.S. accounted for over a quarter of nominal global economic output in 2024, and its economy has been the world's largest by nominal GDP since about 1890. It possesses the most wealth of any country and has the highest disposable household income per capita among
OECD The Organisation for Economic Co-operation and Development (OECD; , OCDE) is an international organization, intergovernmental organization with 38 member countries, founded in 1961 to stimulate economic progress and international trade, wor ...
countries, though U.S. wealth inequality is one of the most pronounced in those countries. A
melting pot A melting pot is a Monoculturalism, monocultural metaphor for a wiktionary:heterogeneous, heterogeneous society becoming more wiktionary:homogeneous, homogeneous, the different elements "melting together" with a common culture; an alternative bei ...
of many ethnicities and customs, the culture of the U.S. has been shaped by centuries of immigration, and its soft power influence has a global reach. The U.S. is a member of multiple international organizations and plays a leading role in global political, cultural, economic, and military affairs.


Etymology

Documented use of the phrase "United States of America" dates back to January 2, 1776. On that day,
Stephen Moylan Stephen Moylan (1737 – April 11, 1811) was an Irish-American patriot leader during the American Revolutionary War. He had several positions in the Continental Army, including Muster-Master General, Secretary and Aide to General George Washin ...
, a
Continental Army The Continental Army was the army of the United Colonies representing the Thirteen Colonies and later the United States during the American Revolutionary War. It was formed on June 14, 1775, by a resolution passed by the Second Continental Co ...
aide to General
George Washington George Washington (, 1799) was a Founding Fathers of the United States, Founding Father and the first president of the United States, serving from 1789 to 1797. As commander of the Continental Army, Washington led Patriot (American Revoluti ...
, wrote a letter to Joseph Reed, Washington's aide-de-camp, seeking to go "with full and ample powers from the United States of America to Spain" to seek assistance in the Revolutionary War effort. The first known public usage is an anonymous essay published in the
Williamsburg Williamsburg may refer to: Places *Colonial Williamsburg, a living-history museum and private foundation in Virginia *Williamsburg, Brooklyn, neighborhood in New York City *Williamsburg, former name of Kernville (former town), California *Williams ...
newspaper ''
The Virginia Gazette ''The Virginia Gazette'' is the local newspaper of Williamsburg, Virginia. Established in 1930, it is named for the historical ''Virginia Gazette'' published between 1736 and 1780. It is published twice a week in the broadsheet format. Historica ...
'' on April 6, 1776. Sometime on or after June 11, 1776,
Thomas Jefferson Thomas Jefferson (, 1743July 4, 1826) was an American Founding Fathers of the United States, Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the United States Declaration of Indepe ...
wrote "United States of America" in a rough draft of the
Declaration of Independence A declaration of independence is an assertion by a polity in a defined territory that it is independent and constitutes a state. Such places are usually declared from part or all of the territory of another state or failed state, or are breaka ...
, which was adopted by the
Second Continental Congress The Second Continental Congress (1775–1781) was the meetings of delegates from the Thirteen Colonies that united in support of the American Revolution and American Revolutionary War, Revolutionary War, which established American independence ...
on July 4, 1776. Davis 1996, p. 7. The term "United States" and its initialism "U.S.", used as nouns or as adjectives in English, are common short names for the country. The initialism "USA", a noun, is also common. "United States" and "U.S." are the established terms throughout the
U.S. federal government The Federal Government of the United States of America (U.S. federal government or U.S. government) is the national government of the United States. The U.S. federal government is composed of three distinct branches: legislative, execut ...
, with prescribed rules. "The States" is an established colloquial shortening of the name, used particularly from abroad; "stateside" is the corresponding adjective or adverb. "" is the feminine form of the first word of , the Latinized name of Italian explorer
Amerigo Vespucci Amerigo Vespucci ( , ; 9 March 1454 – 22 February 1512) was an Italians, Italian explorer and navigator from the Republic of Florence for whom "Naming of the Americas, America" is named. Vespucci participated in at least two voyages of the A ...
(1454–1512); it was first used as a place name by the German cartographers
Martin Waldseemüller Martin Waldseemüller ( – 16 March 1520) was a German cartographer and humanist scholar. Sometimes known by the Hellenized form of his name, Hylacomylus, his work was influential among contemporary cartographers. His collaborator Matthias Ring ...
and
Matthias Ringmann Matthias Ringmann (1482–1511), also known as Philesius Vogesigena, was an Alsatian German Humanism, humanist scholar and cosmography, cosmographer. Along with cartographer Martin Waldseemüller, he is credited with the first documented usage of ...
in 1507. Vespucci first proposed that the
West Indies The West Indies is an island subregion of the Americas, surrounded by the Atlantic Ocean, North Atlantic Ocean and the Caribbean Sea, which comprises 13 independent island country, island countries and 19 dependent territory, dependencies in thr ...
discovered by
Christopher Columbus Christopher Columbus (; between 25 August and 31 October 1451 – 20 May 1506) was an Italians, Italian explorer and navigator from the Republic of Genoa who completed Voyages of Christopher Columbus, four Spanish-based voyages across the At ...
in 1492 were part of a previously unknown landmass and not among the Indies at the eastern limit of Asia. In English, the term "America" rarely refers to topics unrelated to the United States, despite the usage of "the
Americas The Americas, sometimes collectively called America, are a landmass comprising the totality of North America and South America.''Webster's New World College Dictionary'', 2010 by Wiley Publishing, Inc., Cleveland, Ohio. When viewed as a sing ...
" to describe the totality of the continents of
North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...
and
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...
.


History


Indigenous peoples

The first inhabitants of North America migrated from
Siberia Siberia ( ; , ) is an extensive geographical region comprising all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has formed a part of the sovereign territory of Russia and its predecessor states ...
over 12,000 years ago, either across the
Bering land bridge Beringia is defined today as the land and maritime area bounded on the west by the Lena River in Russia; on the east by the Mackenzie River in Canada; on the north by 72° north latitude in the Chukchi Sea; and on the south by the tip of the ...
or along the now-submerged Ice Age coastline. The
Clovis culture The Clovis culture is an archaeological culture from the Paleoindian period of North America, spanning around 13,050 to 12,750 years Before Present (BP). The type site is Blackwater Draw locality No. 1 near Clovis, New Mexico, where stone too ...
, which appeared around 11,000 BC, is believed to be the first widespread culture in the Americas. Over time, Indigenous North American cultures grew increasingly sophisticated, and some, such as the
Mississippian culture The Mississippian culture was a collection of Native American societies that flourished in what is now the Midwestern, Eastern, and Southeastern United States from approximately 800 to 1600 CE, varying regionally. It was known for building la ...
, developed
agriculture Agriculture encompasses crop and livestock production, aquaculture, and forestry for food and non-food products. Agriculture was a key factor in the rise of sedentary human civilization, whereby farming of domesticated species created ...
,
architecture Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and construction, constructi ...
, and complex societies. In the post-archaic period, the Mississippian cultures were located in the
midwestern The Midwestern United States (also referred to as the Midwest, the Heartland or the American Midwest) is one of the four census regions defined by the United States Census Bureau. It occupies the northern central part of the United States. It ...
,
eastern Eastern or Easterns may refer to: Transportation Airlines *China Eastern Airlines, a current Chinese airline based in Shanghai * Eastern Air, former name of Zambia Skyways *Eastern Air Lines, a defunct American airline that operated from 192 ...
, and southern regions, and the Algonquian in the
Great Lakes region The Great Lakes region of Northern America is a binational Canadian– American region centered on the Great Lakes that includes the U.S. states of Illinois, Indiana, Michigan, Minnesota, New York, Ohio, Pennsylvania, and Wisconsin and the Ca ...
and along the Eastern Seaboard, while the Hohokam culture and
Ancestral Puebloans The Ancestral Puebloans, also known as Ancestral Pueblo peoples or the Basketmaker-Pueblo culture, were an ancient Native American culture of Pueblo peoples spanning the present-day Four Corners region of the United States, comprising southe ...
inhabited the
southwest The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A '' compass rose'' is primarily composed of four cardinal directions—north, east, south, and west— ...
. Native population estimates of what is now the United States before the arrival of European immigrants range from around 500,000 to nearly 10 million.


European exploration, colonization and conflict (1513–1765)

Christopher Columbus Christopher Columbus (; between 25 August and 31 October 1451 – 20 May 1506) was an Italians, Italian explorer and navigator from the Republic of Genoa who completed Voyages of Christopher Columbus, four Spanish-based voyages across the At ...
began exploring the
Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America ...
for Spain in 1492, leading to Spanish-speaking settlements and missions from
Puerto Rico ; abbreviated PR), officially the Commonwealth of Puerto Rico, is a Government of Puerto Rico, self-governing Caribbean Geography of Puerto Rico, archipelago and island organized as an Territories of the United States, unincorporated territo ...
and
Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...
to
New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...
and
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
. The first Spanish colony in what is now the continental United States was
Spanish Florida Spanish Florida () was the first major European land-claim and attempted settlement-area in northern America during the European Age of Discovery. ''La Florida'' formed part of the Captaincy General of Cuba in the Viceroyalty of New Spain, and th ...
, chartered in 1513. After several settlements failed there due to hunger and disease, Spain's first permanent town,
Saint Augustine Augustine of Hippo ( , ; ; 13 November 354 – 28 August 430) was a theologian and philosopher of Berbers, Berber origin and the bishop of Hippo Regius in Numidia (Roman province), Numidia, Roman North Africa. His writings deeply influenced th ...
, was founded in 1565. France established its own settlements in
French Florida French Florida (Middle French: ''Floride françoise''; Modern French: ''Floride française'') was a colonial territory established by French Huguenot colonists as part of New France in what is now Florida and South Carolina between 1562 and 156 ...
in 1562, but they were either abandoned (Charlesfort, 1578) or destroyed by Spanish raids (
Fort Caroline Fort Caroline was an attempted French colonial settlement in Florida, located on the banks of the St. Johns River in present-day Duval County. It was established under the leadership of René Goulaine de Laudonnière on 22 June 1564, follow ...
, 1565); permanent French settlements would be founded much later along the
Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...
(
Fort Detroit A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Lati ...
, 1701), the
Mississippi River The Mississippi River is the main stem, primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri River, Missouri. From its traditional source of Lake Ita ...
(Saint Louis, 1764) and especially the
Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...
(
New Orleans New Orleans (commonly known as NOLA or The Big Easy among other nicknames) is a Consolidated city-county, consolidated city-parish located along the Mississippi River in the U.S. state of Louisiana. With a population of 383,997 at the 2020 ...
, 1718). Early European colonies also included the thriving Dutch colony of New Nederland (settled 1626, present-day New York) and the small Swedish colony of
New Sweden New Sweden () was a colony of the Swedish Empire between 1638 and 1655 along the lower reaches of the Delaware River in what is now Delaware, Maryland, New Jersey, and Pennsylvania. Established during the Thirty Years' War when Sweden was a g ...
(settled 1638 in what is now Delaware). British colonization of the East Coast began with the
Virginia Colony The Colony of Virginia was a British colonial settlement in North America from 1606 to 1776. The first effort to create an English settlement in the area was chartered in 1584 and established in 1585; the resulting Roanoke Colony lasted for t ...
(1607) and the
Plymouth Colony Plymouth Colony (sometimes spelled Plimouth) was the first permanent English colony in New England from 1620 and the third permanent English colony in America, after Newfoundland and the Jamestown Colony. It was settled by the passengers on t ...
(Massachusetts, 1620). The
Mayflower Compact The Mayflower Compact, originally titled Agreement Between the Settlers of New Plymouth, was the first governing document of Plymouth Colony. It was written by the men aboard the ''Mayflower,'' consisting of Separatist Puritans, adventurers, a ...
in Massachusetts and the
Fundamental Orders of Connecticut The Fundamental Orders were adopted by the Connecticut Colony council on . The fundamental orders describe the government set up by the Connecticut River New England town, towns, setting its structure and powers and was a driven attempt for the ...
established precedents for representative
self-governance Self-governance, self-government, self-sovereignty or self-rule is the ability of a person or group to exercise all necessary functions of regulation without intervention from an external authority (sociology), authority. It may refer to pers ...
and
constitutionalism Constitutionalism is "a compound of ideas, attitudes, and patterns of behavior elaborating the principle that the authority of government derives from and is limited by a body of fundamental law". Political organizations are constitutional to ...
that would develop throughout the American colonies... While European settlers in what is now the United States experienced conflicts with Native Americans, they also engaged in trade, exchanging European tools for food and animal pelts. Relations ranged from close cooperation to warfare and massacres. The colonial authorities often pursued policies that forced Native Americans to adopt European lifestyles, including conversion to Christianity. Along the eastern seaboard, settlers trafficked African slaves through the
Atlantic slave trade The Atlantic slave trade or transatlantic slave trade involved the transportation by slave traders of Slavery in Africa, enslaved African people to the Americas. European slave ships regularly used the triangular trade route and its Middle Pass ...
. The original
Thirteen Colonies The Thirteen Colonies were the British colonies on the Atlantic coast of North America which broke away from the British Crown in the American Revolutionary War (1775–1783), and joined to form the United States of America. The Thirteen C ...
that would later found the United States were administered as possessions of the
British Empire The British Empire comprised the dominions, Crown colony, colonies, protectorates, League of Nations mandate, mandates, and other Dependent territory, territories ruled or administered by the United Kingdom and its predecessor states. It bega ...
, and had local governments with elections open to most white male property owners. The colonial population grew rapidly from Maine to Georgia, eclipsing Native American populations; by the 1770s, the natural increase of the population was such that only a small minority of Americans had been born overseas. The colonies' distance from Britain allowed for the development of self-governance, and the
First Great Awakening The First Great Awakening, sometimes Great Awakening or the Evangelical Revival, was a series of Christian revivals that swept Britain and its thirteen North American colonies in the 1730s and 1740s. The revival movement permanently affected Pro ...
, a series of
Christian revival Christian revival is defined as "a period of unusual blessing and activity in the life of the Christian Church". Proponents view revivals as the restoration of the Church to a vital and fervent relationship with God after a period of moral decl ...
s, fueled colonial interest in guaranteed
religious liberty Freedom of religion or religious liberty, also known as freedom of religion or belief (FoRB), is a principle that supports the freedom of an individual or community, in public or private, to manifest religion or belief in teaching, practice ...
.


American Revolution and the early republic (1765–1800)

Following their victory in the
French and Indian War The French and Indian War, 1754 to 1763, was a colonial conflict in North America between Kingdom of Great Britain, Great Britain and Kingdom of France, France, along with their respective Native Americans in the United States, Native American ...
, Britain began to assert greater control over local colonial affairs, resulting in colonial political resistance; one of the primary colonial grievances was a denial of their rights as Englishmen, particularly the right to representation in the British government that taxed them. To demonstrate their dissatisfaction and resolve, the
First Continental Congress The First Continental Congress was a meeting of delegates of twelve of the Thirteen Colonies held from September 5 to October 26, 1774, at Carpenters' Hall in Philadelphia at the beginning of the American Revolution. The meeting was organized b ...
met in 1774 and passed the
Continental Association The Continental Association, also known as the Articles of Association or simply the Association, was an agreement among the Thirteen Colonies, American colonies, adopted by the First Continental Congress, which met inside Carpenters' Hall in Phi ...
, a colonial boycott of British goods that proved effective. The British attempt to then disarm the colonists resulted in the 1775
Battles of Lexington and Concord The Battles of Lexington and Concord on April 19, 1775 were the first major military actions of the American Revolutionary War between the Kingdom of Great Britain and Patriot (American Revolution), Patriot militias from America's Thirteen Co ...
, igniting the
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was the armed conflict that comprised the final eight years of the broader American Revolution, in which Am ...
. At the
Second Continental Congress The Second Continental Congress (1775–1781) was the meetings of delegates from the Thirteen Colonies that united in support of the American Revolution and American Revolutionary War, Revolutionary War, which established American independence ...
, the colonies appointed
George Washington George Washington (, 1799) was a Founding Fathers of the United States, Founding Father and the first president of the United States, serving from 1789 to 1797. As commander of the Continental Army, Washington led Patriot (American Revoluti ...
commander-in-chief of the
Continental Army The Continental Army was the army of the United Colonies representing the Thirteen Colonies and later the United States during the American Revolutionary War. It was formed on June 14, 1775, by a resolution passed by the Second Continental Co ...
, and created a committee that named
Thomas Jefferson Thomas Jefferson (, 1743July 4, 1826) was an American Founding Fathers of the United States, Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the United States Declaration of Indepe ...
to draft the
Declaration of Independence A declaration of independence is an assertion by a polity in a defined territory that it is independent and constitutes a state. Such places are usually declared from part or all of the territory of another state or failed state, or are breaka ...
. Two days after passing the
Lee Resolution The Lee Resolution, also known as "The Resolution for Independence", was the formal assertion passed by the Second Continental Congress on July 2, 1776, resolving that the Thirteen Colonies (then referred to as the United Colonies) were "free a ...
to create an independent nation the Declaration was adopted on July 4, 1776. The political values of the American Revolution included
liberty Liberty is the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views. The concept of liberty can vary depending on perspective and context. In the Constitutional ...
, inalienable individual rights; and the sovereignty of the people; supporting
republicanism Republicanism is a political ideology that encompasses a range of ideas from civic virtue, political participation, harms of corruption, positives of mixed constitution, rule of law, and others. Historically, it emphasizes the idea of self ...
and rejecting
monarchy A monarchy is a form of government in which a person, the monarch, reigns as head of state for the rest of their life, or until abdication. The extent of the authority of the monarch may vary from restricted and largely symbolic (constitutio ...
,
aristocracy Aristocracy (; ) is a form of government that places power in the hands of a small, privileged ruling class, the aristocracy (class), aristocrats. Across Europe, the aristocracy exercised immense Economy, economic, Politics, political, and soc ...
, and all hereditary political power;
civic virtue Civic virtue refers to the set of habits, Value (ethics), values, and Attitude (psychology), attitudes that promote the general welfare and the effective functioning of a society. Closely linked to the concept of citizenship, civic virtue () repr ...
; and vilification of
political corruption Political corruption is the use of powers by government officials or their network contacts for illegitimate private gain. Forms of corruption vary but can include bribery, lobbying, extortion, cronyism, nepotism, parochialism, patronage, influen ...
. The
Founding Fathers of the United States The Founding Fathers of the United States, often simply referred to as the Founding Fathers or the Founders, were a group of late-18th-century American Revolution, American revolutionary leaders who United Colonies, united the Thirteen Colon ...
, who included Washington, Jefferson,
John Adams John Adams (October 30, 1735 – July 4, 1826) was a Founding Fathers of the United States, Founding Father and the second president of the United States from 1797 to 1801. Before Presidency of John Adams, his presidency, he was a leader of ...
,
Benjamin Franklin Benjamin Franklin (April 17, 1790) was an American polymath: a writer, scientist, inventor, statesman, diplomat, printer, publisher and Political philosophy, political philosopher.#britannica, Encyclopædia Britannica, Wood, 2021 Among the m ...
,
Alexander Hamilton Alexander Hamilton (January 11, 1755 or 1757July 12, 1804) was an American military officer, statesman, and Founding Fathers of the United States, Founding Father who served as the first U.S. secretary of the treasury from 1789 to 1795 dur ...
,
John Jay John Jay (, 1745 – May 17, 1829) was an American statesman, diplomat, signatory of the Treaty of Paris (1783), Treaty of Paris, and a Founding Father of the United States. He served from 1789 to 1795 as the first chief justice of the United ...
,
James Madison James Madison (June 28, 1836) was an American statesman, diplomat, and Founding Fathers of the United States, Founding Father who served as the fourth president of the United States from 1809 to 1817. Madison was popularly acclaimed as the ...
,
Thomas Paine Thomas Paine (born Thomas Pain; – In the contemporary record as noted by Conway, Paine's birth date is given as January 29, 1736–37. Common practice was to use a dash or a slash to separate the old-style year from the new-style year. In ...
, and many others, were inspired by Classical,
Renaissance The Renaissance ( , ) is a Periodization, period of history and a European cultural movement covering the 15th and 16th centuries. It marked the transition from the Middle Ages to modernity and was characterized by an effort to revive and sur ...
, and
Enlightenment Enlightenment or enlighten may refer to: Age of Enlightenment * Age of Enlightenment, period in Western intellectual history from the late 17th to late 18th century, centered in France but also encompassing (alphabetically by country or culture): ...
philosophies and ideas. Though in practical effect since its drafting in 1777, the
Articles of Confederation The Articles of Confederation, officially the Articles of Confederation and Perpetual Union, was an agreement and early body of law in the Thirteen Colonies, which served as the nation's first Constitution, frame of government during the Ameri ...
and Perpetual Union was ratified in 1781 and formally established a decentralized government that operated until 1789. After the British surrender at the
siege of Yorktown The siege of Yorktown, also known as the Battle of Yorktown and the surrender at Yorktown, was the final battle of the American Revolutionary War. It was won decisively by the Continental Army, led by George Washington, with support from the Ma ...
in 1781, American sovereignty was internationally recognized by the Treaty of Paris (1783), through which the U.S. gained territory stretching west to the Mississippi River, north to present-day Canada, and south to
Spanish Florida Spanish Florida () was the first major European land-claim and attempted settlement-area in northern America during the European Age of Discovery. ''La Florida'' formed part of the Captaincy General of Cuba in the Viceroyalty of New Spain, and th ...
. The
Northwest Ordinance The Northwest Ordinance (formally An Ordinance for the Government of the Territory of the United States, North-West of the River Ohio and also known as the Ordinance of 1787), enacted July 13, 1787, was an organic act of the Congress of the Co ...
(1787) established the precedent by which the country's territory would expand with the admission of new states, rather than the expansion of existing states. The
U.S. Constitution The Constitution of the United States is the supreme law of the United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constituti ...
was drafted at the 1787 Constitutional Convention to overcome the limitations of the Articles. It went into effect in 1789, creating a
federal republic A federal republic is a federation of Federated state, states with a republican form of government. At its core, the literal meaning of the word republic when used to reference a form of government means a country that is governed by elected re ...
governed by three separate branches that together ensured a system of
checks and balances The separation of powers principle functionally differentiates several types of state power (usually law-making, adjudication, and execution) and requires these operations of government to be conceptually and institutionally distinguishabl ...
. George Washington was elected the country's first president under the Constitution, and the
Bill of Rights A bill of rights, sometimes called a declaration of rights or a charter of rights, is a list of the most important rights to the citizens of a country. The purpose is to protect those rights against infringement from public officials and pri ...
was adopted in 1791 to allay skeptics' concerns about the power of the more centralized government. His resignation as commander-in-chief after the Revolutionary War and his later refusal to run for a third term as the country's first president established a precedent for the supremacy of civil authority in the United States and the
peaceful transfer of power A peaceful transition or transfer of power is a concept important to democratic governments in which the leadership of a government peacefully hands over control of government to a newly elected leadership. This may be after elections or during t ...
. Boyer, 2007, pp. 192–193


Westward expansion and Civil War (1800–1865)

In the late 18th century, American settlers began to expand westward in larger numbers, many with a sense of
manifest destiny Manifest destiny was the belief in the 19th century in the United States, 19th-century United States that American pioneer, American settlers were destined to expand westward across North America, and that this belief was both obvious ("''m ...
. The
Louisiana Purchase The Louisiana Purchase () was the acquisition of the Louisiana (New France), territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River#Watershed, Mississipp ...
of 1803 from France nearly doubled the territory of the United States. Lingering issues with Britain remained, leading to the
War of 1812 The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the Uni ...
, which was fought to a draw. Spain ceded Florida and its Gulf Coast territory in 1819. The
Missouri Compromise The Missouri Compromise (also known as the Compromise of 1820) was federal legislation of the United States that balanced the desires of northern states to prevent the expansion of slavery in the country with those of southern states to expand ...
of 1820, which admitted
Missouri Missouri (''see #Etymology and pronunciation, pronunciation'') is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it border ...
as a
slave state In the United States before 1865, a slave state was a state in which slavery and the internal or domestic slave trade were legal, while a free state was one in which they were prohibited. Between 1812 and 1850, it was considered by the slave s ...
and
Maine Maine ( ) is a U.S. state, state in the New England region of the United States, and the northeasternmost state in the Contiguous United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Provinces and ...
as a free state, attempted to balance the desire of northern states to prevent the expansion of slavery into new territories with that of southern states to extend it there. Primarily, the compromise prohibited slavery in all other lands of the Louisiana Purchase north of the 36°30′ parallel. As Americans expanded further into territory inhabited by Native Americans, the federal government implemented policies of Indian removal or assimilation. The most significant such legislation was the Indian Removal Act of 1830, a key policy of President
Andrew Jackson Andrew Jackson (March 15, 1767 – June 8, 1845) was the seventh president of the United States from 1829 to 1837. Before Presidency of Andrew Jackson, his presidency, he rose to fame as a general in the U.S. Army and served in both houses ...
. It resulted in the
Trail of Tears The Trail of Tears was the forced displacement of about 60,000 people of the " Five Civilized Tribes" between 1830 and 1850, and the additional thousands of Native Americans and their black slaves within that were ethnically cleansed by the U ...
(1830–1850), in which an estimated 60,000 Native Americans living east of the
Mississippi River The Mississippi River is the main stem, primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri River, Missouri. From its traditional source of Lake Ita ...
were forcibly removed and displaced to lands far to the west, causing 13,200 to 16,700 deaths along the forced march. Settler expansion as well as this influx of Indigenous peoples from the East resulted in the
American Indian Wars The American Indian Wars, also known as the American Frontier Wars, and the Indian Wars, was a conflict initially fought by European colonization of the Americas, European colonial empires, the United States, and briefly the Confederate States o ...
west of the Mississippi. The United States annexed the Republic of Texas in 1845, and the 1846
Oregon Treaty The Oregon Treaty was a treaty between the United Kingdom and the United States that was signed on June 15, 1846, in Washington, D.C. The treaty brought an end to the Oregon boundary dispute by settling competing American and British claims to ...
led to U.S. control of the present-day American Northwest. Dispute with Mexico over Texas led to the
Mexican–American War The Mexican–American War (Spanish language, Spanish: ''guerra de Estados Unidos-México, guerra mexicano-estadounidense''), also known in the United States as the Mexican War, and in Mexico as the United States intervention in Mexico, ...
(1846–1848). After the victory of the U.S., Mexico recognized U.S sovereignty over Texas,
New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...
, and
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
in the 1848
Mexican Cession The Mexican Cession () is the region in the modern-day Western United States that Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United S ...
; the cession's lands also included the future states of
Nevada Nevada ( ; ) is a landlocked state in the Western United States. It borders Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the seventh-most extensive, th ...
,
Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
and
Utah Utah is a landlocked state in the Mountain states, Mountain West subregion of the Western United States. It is one of the Four Corners states, sharing a border with Arizona, Colorado, and New Mexico. It also borders Wyoming to the northea ...
. The
California gold rush The California gold rush (1848–1855) began on January 24, 1848, when gold was found by James W. Marshall at Sutter's Mill in Coloma, California. The news of gold brought approximately 300,000 people to California from the rest of the U ...
of 1848–1849 spurred a huge migration of white settlers to the Pacific coast, leading to even more confrontations with Native populations. One of the most violent, the
California genocide The California genocide was a series of genocidal massacres of the indigenous peoples of California by United States soldiers and settlers during the 19th century. It began following the American conquest of California in the Mexican–Americ ...
of thousands of Native inhabitants, lasted into the mid-1870s. Additional western territories and states were created. During the colonial period, slavery had been legal in the American colonies, becoming the main labor force in the large-scale, agriculture-dependent economies of the
Southern Colonies The Southern Colonies within British America consisted of the Province of Maryland, the Colony of Virginia, the Province of Carolina (in 1712 split into North and South Carolina), and the Province of Georgia. In 1763, the newly created colonies ...
from Maryland to Georgia. The practice began to be significantly questioned during the American Revolution, and spurred by an active abolitionist movement that had reemerged in the 1830s, states in the North enacted laws to prohibit slavery within their boundaries. At the same time, support for slavery had strengthened in Southern states, with widespread use of inventions such as the
cotton gin A cotton gin—meaning "cotton engine"—is a machine that quickly and easily separates cotton fibers from their seeds, enabling much greater productivity than manual cotton separation.. Reprinted by McGraw-Hill, New York and London, 1926 (); ...
(1793) having made slavery immensely profitable for Southern elites. Throughout the 1850s, this sectional conflict regarding slavery was further inflamed by national legislation in Congress and decisions of the Supreme Court: The
Fugitive Slave Act of 1850 The Fugitive Slave Act or Fugitive Slave Law was a law passed by the 31st United States Congress on September 18, 1850, as part of the Compromise of 1850 between Southern interests in slavery and Northern Free-Soilers. The Act was one ...
mandated the forcible return to their owners in the South of slaves taking refuge in non-slave states. The Kansas–Nebraska Act of 1854 effectively gutted the anti-slavery requirements of the Missouri Compromise. Finally, in its
Dred Scott decision ''Dred Scott v. Sandford'', 60 U.S. (19 How.) 393 (1857), was a landmark decision of the United States Supreme Court that held the U.S. Constitution did not extend American citizenship to people of black African descent, and therefore they ...
of 1857, the Supreme Court ruled against a slave brought into non-slave territory and declared the entire Missouri Compromise to be unconstitutional. These events exacerbated tensions between North and South that would culminate in the
American Civil War The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...
(1861–1865). Beginning with
South Carolina South Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders North Carolina to the north and northeast, the Atlantic Ocean to the southeast, and Georgia (U.S. state), Georg ...
, 11 slave-state governments voted to secede from the United States in 1861, joining to create the
Confederate States of America The Confederate States of America (CSA), also known as the Confederate States (C.S.), the Confederacy, or Dixieland, was an List of historical unrecognized states and dependencies, unrecognized breakaway republic in the Southern United State ...
. All other states remained in the Union. War broke out in April 1861 after the Confederacy bombarded Fort Sumter. Following the January 1, 1863
Emancipation Proclamation The Emancipation Proclamation, officially Proclamation 95, was a presidential proclamation and executive order issued by United States President Abraham Lincoln on January 1, 1863, during the American Civil War. The Proclamation had the eff ...
, many freed slaves joined the Union army. The war began to turn in the Union's favor following the 1863
Siege of Vicksburg The siege of Vicksburg (May 18 – July 4, 1863) was the final major military action in the Vicksburg campaign of the American Civil War. In a series of maneuvers, Union Major General Ulysses S. Grant and his Army of the Tennessee crossed th ...
and
Battle of Gettysburg The Battle of Gettysburg () was a three-day battle in the American Civil War, which was fought between the Union and Confederate armies between July 1 and July 3, 1863, in and around Gettysburg, Pennsylvania. The battle, won by the Union, ...
, and the Confederates surrendered in 1865 after the Union's victory in the
Battle of Appomattox Court House The Battle of Appomattox Court House, fought in Appomattox County, Virginia, on the morning of April 9, 1865, was one of the last, and ultimately one of the most consequential, battles of the American Civil War (1861–1865). It was the final e ...
.


Reconstruction, Gilded Age, and Progressive Era (1863–1917)

Efforts toward reconstruction in the secessionist South had begun as early as 1862, but it was only after President Lincoln's assassination that the three
Reconstruction Amendments The , or the , are the Thirteenth, Fourteenth, and Fifteenth amendments to the United States Constitution, adopted between 1865 and 1870. The amendments were a part of the implementation of the Reconstruction of the American South which oc ...
to the Constitution were ratified to protect civil rights. The amendments codified nationally the abolition of slavery and involuntary servitude except as punishment for crimes, promised equal protection under the law for all persons, and prohibited discrimination on the basis of race or previous enslavement. As a result, African Americans took an active political role in ex-Confederate states in the decade following the Civil War. The former Confederate states were readmitted to the Union, beginning with Tennessee in 1866 and ending with Georgia in 1870. National infrastructure, including transcontinental telegraph and
railroads Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in tracks, which usually consist of two parallel steel rails. Rail transport is one of the two primary means of land transport, next to road ...
, spurred growth in the
American frontier The American frontier, also known as the Old West, and popularly known as the Wild West, encompasses the Geography of the United States, geography, History of the United States, history, Folklore of the United States, folklore, and Cultur ...
. This was accelerated by the
Homestead Acts The Homestead Acts were several laws in the United States by which an applicant could acquire ownership of government land or the public domain, typically called a homestead. In all, more than of public land, or nearly 10 percent of t ...
, through which nearly 10 percent of the total land area of the United States was given away free to some 1.6 million homesteaders. From 1865 through 1917, an unprecedented stream of immigrants arrived in the United States, including 24.4 million from Europe. Most came through the port of New York City, and New York City and other large cities on the East Coast became home to large
Jewish Jews (, , ), or the Jewish people, are an ethnoreligious group and nation, originating from the Israelites of History of ancient Israel and Judah, ancient Israel and Judah. They also traditionally adhere to Judaism. Jewish ethnicity, rel ...
, Irish, and
Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...
populations, while many
Germans Germans (, ) are the natives or inhabitants of Germany, or sometimes more broadly any people who are of German descent or native speakers of the German language. The Basic Law for the Federal Republic of Germany, constitution of Germany, imple ...
and Central Europeans moved to the
Midwest The Midwestern United States (also referred to as the Midwest, the Heartland or the American Midwest) is one of the four census regions defined by the United States Census Bureau. It occupies the northern central part of the United States. It ...
. At the same time, about one million
French Canadians French Canadians, referred to as Canadiens mainly before the nineteenth century, are an ethnic group descended from French colonists first arriving in France's colony of Canada in 1608. The vast majority of French Canadians live in the provi ...
migrated from
Quebec Quebec is Canada's List of Canadian provinces and territories by area, largest province by area. Located in Central Canada, the province shares borders with the provinces of Ontario to the west, Newfoundland and Labrador to the northeast, ...
to
New England New England is a region consisting of six states in the Northeastern United States: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. It is bordered by the state of New York (state), New York to the west and by the ...
. During the Great Migration, millions of African Americans left the rural South for urban areas in the North. Alaska was purchased from
Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
in 1867. The
Compromise of 1877 The Compromise of 1877, also known as the Wormley Agreement, the Tilden-Hayes Compromise, the Bargain of 1877, or Corrupt bargain, the Corrupt Bargain, was a speculated unwritten political deal in the United States to settle the intense dispute ...
is generally considered the end of the Reconstruction era, as it resolved the electoral crisis following the 1876 presidential election and led President
Rutherford B. Hayes Rutherford Birchard Hayes (; October 4, 1822 – January 17, 1893) was the 19th president of the United States, serving from 1877 to 1881. Hayes served as Cincinnati's city solicitor from 1858 to 1861. He was a staunch Abolitionism in the Un ...
to reduce the role of federal troops in the South. Immediately, the
Redeemers The Redeemers were a political coalition in the Southern United States during the Reconstruction era of the United States, Reconstruction Era that followed the American Civil War. Redeemers were the Southern wing of the Democratic Party (Unite ...
began evicting the
Carpetbaggers In the history of the United States, carpetbagger is a largely historical pejorative used by Southerners to describe allegedly opportunistic or disruptive Northerners who came to the Southern states after the American Civil War and were per ...
and quickly regained local control of Southern politics in the name of
white supremacy White supremacy is the belief that white people are superior to those of other races. The belief favors the maintenance and defense of any power and privilege held by white people. White supremacy has roots in the now-discredited doctrine ...
. African Americans endured a period of heightened, overt racism following Reconstruction, a time often called the
nadir of American race relations The nadir of American race relations was the period in African-American history and the history of the United States from the end of Reconstruction in 1877 through the early 20th century, when racism in the country, and particularly anti-bl ...
. A series of Supreme Court decisions, including ''
Plessy v. Ferguson ''Plessy v. Ferguson'', 163 U.S. 537 (1896), was a landmark U.S. Supreme Court decision ruling that racial segregation laws did not violate the U.S. Constitution as long as the facilities for each race were equal in quality, a doctrine that ...
'', emptied the Fourteenth and Fifteenth Amendments of their force, allowing
Jim Crow laws The Jim Crow laws were U.S. state, state and local laws introduced in the Southern United States in the late 19th and early 20th centuries that enforced Racial segregation in the United States, racial segregation, "Jim Crow (character), Ji ...
in the South to remain unchecked,
sundown town Sundown towns, also known as sunset towns, gray towns, or sundowner towns, were all-white municipalities or neighborhoods in the United States. They were towns that practiced a form of racial segregation by excluding non-whites via some combinati ...
s in the Midwest, and segregation in communities across the country, which would be reinforced by the policy of
redlining Redlining is a Discrimination, discriminatory practice in which financial services are withheld from neighborhoods that have significant numbers of Race (human categorization), racial and Ethnic group, ethnic minorities. Redlining has been mos ...
later adopted by the federal
Home Owners' Loan Corporation The Home Owners' Loan Corporation (HOLC) was a government-sponsored corporation created as part of the New Deal. The corporation was established in 1933 by the Home Owners' Loan Corporation Act under the leadership of President Franklin D. Roo ...
. An explosion of technological advancement accompanied by the exploitation of cheap immigrant labor led to rapid economic expansion during the late 19th and early 20th centuries, allowing the United States to outpace the economies of England, France, and Germany combined. This fostered the amassing of power by a few prominent industrialists, largely by their formation of
trusts A trust is a legal relationship in which the owner of property, or any transferable right, gives it to another to manage and use solely for the benefit of a designated person. In the English common law, the party who entrusts the property is k ...
and
monopolies A monopoly (from Greek and ) is a market in which one person or company is the only supplier of a particular good or service. A monopoly is characterized by a lack of economic competition to produce a particular thing, a lack of viable sub ...
to prevent competition.
Tycoon A business magnate, also known as an industrialist or tycoon, is a person who is a powerful entrepreneur and investor who controls, through personal enterprise ownership or a dominant shareholding position, a firm or industry whose goods or ser ...
s led the nation's expansion in the
railroad Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in railway track, tracks, which usually consist of two parallel steel railway track, rails. Rail transport is one of the two primary means of ...
,
petroleum Petroleum, also known as crude oil or simply oil, is a naturally occurring, yellowish-black liquid chemical mixture found in geological formations, consisting mainly of hydrocarbons. The term ''petroleum'' refers both to naturally occurring un ...
, and
steel Steel is an alloy of iron and carbon that demonstrates improved mechanical properties compared to the pure form of iron. Due to steel's high Young's modulus, elastic modulus, Yield (engineering), yield strength, Fracture, fracture strength a ...
industries. The United States emerged as a pioneer of the
automotive industry The automotive industry comprises a wide range of company, companies and organizations involved in the design, Business development, development, manufacturing, marketing, selling, Maintenance, repairing, and Custom car, modification of motor ve ...
. These changes were accompanied by significant increases in economic inequality, slum conditions, and
social unrest Civil disorder, also known as civil disturbance, civil unrest, civil strife, or turmoil, are situations when law enforcement and security forces struggle to Public order policing, maintain public order or tranquility. Causes Any number of thin ...
, creating the environment for
labor unions A trade union (British English) or labor union (American English), often simply referred to as a union, is an organization of workers whose purpose is to maintain or improve the conditions of their employment, such as attaining better wages ...
and socialist movements to begin to flourish. This period eventually ended with the advent of the
Progressive Era The Progressive Era (1890s–1920s) was a period in the United States characterized by multiple social and political reform efforts. Reformers during this era, known as progressivism in the United States, Progressives, sought to address iss ...
, which was characterized by significant reforms.Aldrich, Mark. ''Safety First: Technology, Labor and Business in the Building of Work Safety, 1870-1939.'' Baltimore: Johns Hopkins University Press, 1997. . Pro-American elements in Hawaii overthrew the Hawaiian monarchy; the islands were annexed in 1898. That same year,
Puerto Rico ; abbreviated PR), officially the Commonwealth of Puerto Rico, is a Government of Puerto Rico, self-governing Caribbean Geography of Puerto Rico, archipelago and island organized as an Territories of the United States, unincorporated territo ...
,
the Philippines The Philippines, officially the Republic of the Philippines, is an archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of 7,641 islands, with a total area of roughly 300,000 square kilometers, which ar ...
, and
Guam Guam ( ; ) is an island that is an Territories of the United States, organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. Guam's capital is Hagåtña, Guam, Hagåtña, and the most ...
were ceded to the U.S. by Spain after the latter's defeat in the
Spanish–American War The Spanish–American War (April 21 – August 13, 1898) was fought between Restoration (Spain), Spain and the United States in 1898. It began with the sinking of the USS Maine (1889), USS ''Maine'' in Havana Harbor in Cuba, and resulted in the ...
. (The Philippines was granted full independence from the U.S. on July 4, 1946, following World War II. Puerto Rico and Guam have remained U.S. territories.)
American Samoa American Samoa is an Territories of the United States, unincorporated and unorganized territory of the United States located in the Polynesia region of the Pacific Ocean, South Pacific Ocean. Centered on , it is southeast of the island count ...
was acquired by the United States in 1900 after the
Second Samoan Civil War The Second Samoan Civil War. Samoan Taua Lona Lua a Samoa was a conflict that reached a head in 1898 when Germany, the United Kingdom, and the United States were locked in dispute over who should have control over the Samoan island chain, loc ...
. The
U.S. Virgin Islands The United States Virgin Islands, officially the Virgin Islands of the United States, are a group of Caribbean islands and a territory of the United States. The islands are geographically part of the Virgin Islands archipelago and are located ...
were purchased from
Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ...
in 1917.


World War I, Great Depression, and World War II (1917–1945)

The United States entered World War I alongside the
Allies An alliance is a relationship among people, groups, or states that have joined together for mutual benefit or to achieve some common purpose, whether or not an explicit agreement has been worked out among them. Members of an alliance are calle ...
in 1917 helping to turn the tide against the
Central Powers The Central Powers, also known as the Central Empires,; ; , ; were one of the two main coalitions that fought in World War I (1914–1918). It consisted of the German Empire, Austria-Hungary, the Ottoman Empire, and the Kingdom of Bulga ...
. In 1920, a constitutional amendment granted nationwide
women's suffrage Women's suffrage is the women's rights, right of women to Suffrage, vote in elections. Several instances occurred in recent centuries where women were selectively given, then stripped of, the right to vote. In Sweden, conditional women's suffra ...
. During the 1920s and 1930s, radio for
mass communication Mass communication is the process of imparting and exchanging information through mass media to large population segments. It utilizes various forms of media as technology has made the dissemination of information more efficient. Primary examples o ...
and early television transformed communications nationwide. The Wall Street Crash of 1929 triggered the
Great Depression The Great Depression was a severe global economic downturn from 1929 to 1939. The period was characterized by high rates of unemployment and poverty, drastic reductions in industrial production and international trade, and widespread bank and ...
, to which President
Franklin D. Roosevelt Franklin Delano Roosevelt (January 30, 1882April 12, 1945), also known as FDR, was the 32nd president of the United States, serving from 1933 until his death in 1945. He is the longest-serving U.S. president, and the only one to have served ...
responded with the
New Deal The New Deal was a series of wide-reaching economic, social, and political reforms enacted by President Franklin D. Roosevelt in the United States between 1933 and 1938, in response to the Great Depression in the United States, Great Depressi ...
plan of “reform, recovery and relief”, a series of unprecedented and sweeping recovery programs and employment relief projects combined with financial reforms and regulations. Initially neutral during
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, the U.S. began supplying war materiel to the
Allies of World War II The Allies, formally referred to as the United Nations from 1942, were an international Coalition#Military, military coalition formed during World War II (1939–1945) to oppose the Axis powers. Its principal members were the "Four Policeme ...
in March 1941 and entered the war in December after the
Empire of Japan The Empire of Japan, also known as the Japanese Empire or Imperial Japan, was the Japanese nation state that existed from the Meiji Restoration on January 3, 1868, until the Constitution of Japan took effect on May 3, 1947. From Japan–Kor ...
's
attack on Pearl Harbor The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Empire of Japan on the United States Pacific Fleet at Naval Station Pearl Harbor, its naval base at Pearl Harbor on Oahu, Territory of ...
. The U.S. developed the first nuclear weapons and used them against the Japanese cities of Hiroshima and Nagasaki in August 1945, ending the war. The United States was one of the "
Four Policemen The "Four Policemen" was a postwar council with the Big Four that U.S. president Franklin D. Roosevelt proposed as a guarantor of world peace. Their members were called the Four Powers during World War II and were the four major Allies of Worl ...
" who met to plan the post-war world, alongside the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
,
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
, and
China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...
. The U.S. emerged relatively unscathed from the war, with even greater
economic power Economic power refers to the ability of countries, businesses or individuals to make decisions on their own that benefit them. Scholars of international relations also refer to the economic power of a country as a factor influencing its power in ...
and international political influence.


Cold War and social revolution (1945–1991)

The end of
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
in 1945 left the U.S. and the Soviet Union as
superpower Superpower describes a sovereign state or supranational union that holds a dominant position characterized by the ability to Sphere of influence, exert influence and Power projection, project power on a global scale. This is done through the comb ...
s, each with its own political, military, and economic sphere of influence. Geopolitical tensions between the two superpowers soon led to the
Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...
. The U.S. utilized the policy of
containment Containment was a Geopolitics, geopolitical strategic foreign policy pursued by the United States during the Cold War to prevent the spread of communism after the end of World War II. The name was loosely related to the term ''Cordon sanitaire ...
to limit the USSR's sphere of influence, engaged in
regime change Regime change is the partly forcible or coercive replacement of one government regime with another. Regime change may replace all or part of the state's most critical leadership system, administrative apparatus, or bureaucracy. Regime change may ...
against governments perceived to be aligned with Moscow, and prevailed in the
Space Race The Space Race (, ) was a 20th-century competition between the Cold War rivals, the United States and the Soviet Union, to achieve superior spaceflight capability. It had its origins in the ballistic missile-based nuclear arms race between t ...
, which culminated with the first crewed Moon landing in 1969. Domestically, the U.S. experienced economic growth,
urbanization Urbanization (or urbanisation in British English) is the population shift from Rural area, rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. ...
, and population growth following World War II. The civil rights movement emerged, with
Martin Luther King Jr. Martin Luther King Jr. (born Michael King Jr.; January 15, 1929 – April 4, 1968) was an American Baptist minister, civil and political rights, civil rights activist and political philosopher who was a leader of the civil rights move ...
becoming a prominent leader in the early 1960s. The
Great Society The Great Society was a series of domestic programs enacted by President Lyndon B. Johnson in the United States between 1964 and 1968, aimed at eliminating poverty, reducing racial injustice, and expanding social welfare in the country. Johnso ...
plan of President
Lyndon B. Johnson Lyndon Baines Johnson (; August 27, 1908January 22, 1973), also known as LBJ, was the 36th president of the United States, serving from 1963 to 1969. He became president after the assassination of John F. Kennedy, under whom he had served a ...
's administration resulted in groundbreaking and broad-reaching laws, policies and a constitutional amendment to counteract some of the worst effects of lingering
institutional racism Institutional racism, also known as systemic racism, is a form of institutional discrimination based on Race (human categorization), race or ethnic group and can include policies and practices that exist throughout a whole society or organizati ...
. The
counterculture movement The counterculture of the 1960s was an anti-establishment cultural phenomenon and political movement that developed in the Western world during the mid-20th century. It began in the early 1960s, and continued through the early 1970s. It is ofte ...
in the U.S. brought significant social changes, including the liberalization of attitudes toward
recreational drug use Recreational drug use is the use of one or more psychoactive drugs to induce an altered state of consciousness, either for pleasure or for some other casual purpose or pastime. When a psychoactive drug enters the user's body, it induces an Sub ...
and
sexuality Human sexuality is the way people experience and express themselves sexually. This involves biological, psychological, physical, erotic, emotional, social, or spiritual feelings and behaviors. Because it is a broad term, which has varied ...
. It also encouraged open defiance of the military draft (leading to the end of conscription in 1973) and wide opposition to U.S. intervention in Vietnam (with the U.S. totally withdrawing in 1975). A societal shift in the roles of women was significantly responsible for the large increase in female paid labor participation during the 1970s, and by 1985 the majority of American women aged 16 and older were employed. The
fall of communism The revolutions of 1989, also known as the Fall of Communism, were a revolutionary wave of liberal democracy movements that resulted in the collapse of most Marxist–Leninist governments in the Eastern Bloc and other parts of the world. Th ...
and the
collapse of the Soviet Union The Soviet Union was formally dissolved as a sovereign state and subject of international law on 26 December 1991 by Declaration No. 142-N of the Soviet of the Republics of the Supreme Soviet of the Soviet Union. Declaration No. 142-Н of ...
from 1989 to 1991 marked the end of the Cold War and left the United States as the world's sole superpower. This cemented the United States' global influence, reinforcing the concept of the "
American Century The American Century is a characterization of the period since the middle of the 20th century as being largely dominated by the United States in political, economic, technological, and cultural terms. It is comparable to the description of the p ...
" as it dominated international political, economic, and military affairs.


Contemporary (1991–present)

The 1990s saw the longest recorded economic expansion in American history, a dramatic decline in U.S. crime rates, and advances in technology. Throughout this decade, technological innovations such as the
World Wide Web The World Wide Web (WWW or simply the Web) is an information system that enables Content (media), content sharing over the Internet through user-friendly ways meant to appeal to users beyond Information technology, IT specialists and hobbyis ...
, the evolution of the Pentium microprocessor in accordance with
Moore's law Moore's law is the observation that the Transistor count, number of transistors in an integrated circuit (IC) doubles about every two years. Moore's law is an observation and Forecasting, projection of a historical trend. Rather than a law of ...
, rechargeable
lithium-ion batteries A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li+ ions into electronically conducting solids to store energy. Li-ion batteries are characterized by higher specific energy, energy ...
, the first
gene therapy Gene therapy is Health technology, medical technology that aims to produce a therapeutic effect through the manipulation of gene expression or through altering the biological properties of living cells. The first attempt at modifying human DNA ...
trial, and
cloning Cloning is the process of producing individual organisms with identical genomes, either by natural or artificial means. In nature, some organisms produce clones through asexual reproduction; this reproduction of an organism by itself without ...
either emerged in the U.S. or were improved upon there. The
Human Genome Project The Human Genome Project (HGP) was an international scientific research project with the goal of determining the base pairs that make up human DNA, and of identifying, mapping and sequencing all of the genes of the human genome from both a ...
was formally launched in 1990, while
Nasdaq The Nasdaq Stock Market (; National Association of Securities Dealers Automated Quotations) is an American stock exchange based in New York City. It is the most active stock trading venue in the U.S. by volume, and ranked second on the list ...
became the first stock market in the United States to trade online in 1998. In the
Gulf War , combatant2 = , commander1 = , commander2 = , strength1 = Over 950,000 soldiers3,113 tanks1,800 aircraft2,200 artillery systems , page = https://www.govinfo.gov/content/pkg/GAOREPORTS-PEMD-96- ...
of 1991, an American-led international coalition of states expelled an Iraqi invasion force that had occupied neighboring
Kuwait Kuwait, officially the State of Kuwait, is a country in West Asia and the geopolitical region known as the Middle East. It is situated in the northern edge of the Arabian Peninsula at the head of the Persian Gulf, bordering Iraq to Iraq–Kuwait ...
. The
September 11 attacks The September 11 attacks, also known as 9/11, were four coordinated Islamist terrorist suicide attacks by al-Qaeda against the United States in 2001. Nineteen terrorists hijacked four commercial airliners, crashing the first two into ...
on the United States in 2001 by the
pan-Islamist Pan-Islamism () is a political movement which advocates the unity of Muslims under one Islamic country or state – often a caliphate – or an international organization with Islamic principles. Historically, after Ottomanism, which aimed at t ...
militant organization
al-Qaeda , image = Flag of Jihad.svg , caption = Jihadist flag, Flag used by various al-Qaeda factions , founder = Osama bin Laden{{Assassinated, Killing of Osama bin Laden , leaders = {{Plainlist, * Osama bin Lad ...
led to the war on terror, and subsequent military interventions in Afghanistan and
Iraq Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to Iraq–Saudi Arabia border, the south, Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and ...
. The U.S. housing bubble culminated in 2007 with the
Great Recession The Great Recession was a period of market decline in economies around the world that occurred from late 2007 to mid-2009.
, the largest economic contraction since the Great Depression. Coming to a head in the 2010s, political polarization in the country increased between liberal and conservative factions. This polarization was capitalized upon in the January 2021 Capitol attack, when a mob of insurrectionists entered the U.S. Capitol and sought to prevent the peaceful transfer of power in an attempted self-coup d'état. The
2021 Taliban offensive The 2021 Taliban offensive was a Offensive (military), military offensive by the Taliban insurgent group and allied militants that led to the fall of the Islamic Republic of Afghanistan and the end of the nearly 20-year War in Afghanistan (200 ...
(May–August) ended the
War in Afghanistan War in Afghanistan, Afghan war, or Afghan civil war may refer to: *Conquest of Afghanistan by Alexander the Great (330 BC – 327 BC), the conquest of Afghanistan by the Macedonian Empire * Muslim conquests of Afghanistan, a series of campaigns in ...
one year after the U.S. signed a peace agreement with the Taliban.


Geography

The United States is the world's third-largest country by total area behind Russia and Canada. The 48 contiguous states and the District of Columbia have a combined area of . In 2021, the United States had 8% of the earth's permanent meadows and pastures and 10% of its cropland. Starting in the east, the coastal plain of the
Atlantic The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for se ...
seaboard gives way to inland forests and rolling hills in the
Piedmont Piedmont ( ; ; ) is one of the 20 regions of Italy, located in the northwest Italy, Northwest of the country. It borders the Liguria region to the south, the Lombardy and Emilia-Romagna regions to the east, and the Aosta Valley region to the ...
plateau region. The
Appalachian Mountains The Appalachian Mountains, often called the Appalachians, are a mountain range in eastern to northeastern North America. The term "Appalachian" refers to several different regions associated with the mountain range, and its surrounding terrain ...
and the Adirondack Massif separate the East Coast from the
Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...
and the grasslands of the Midwest. The
Mississippi River System The Mississippi River System, also referred to as the Western Rivers, is a mostly riverine network of the United States which includes the Mississippi River and connecting waterways. The Mississippi River is the largest drainage basin in the Unit ...
, the world's fourth-longest river system, runs predominantly north–south through the center of the country. The flat and fertile
prairie Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the ...
of the
Great Plains The Great Plains is a broad expanse of plain, flatland in North America. The region stretches east of the Rocky Mountains, much of it covered in prairie, steppe, and grassland. They are the western part of the Interior Plains, which include th ...
stretches to the west, interrupted by a highland region in the southeast. The
Rocky Mountains The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in great-circle distance, straight-line distance from the northernmost part of Western Can ...
, west of the Great Plains, extend north to south across the country, peaking at over in
Colorado Colorado is a U.S. state, state in the Western United States. It is one of the Mountain states, sharing the Four Corners region with Arizona, New Mexico, and Utah. It is also bordered by Wyoming to the north, Nebraska to the northeast, Kansas ...
. The
supervolcano A supervolcano is a volcano that has had an eruption with a volcanic explosivity index (VEI) of 8, the largest recorded value on the index. This means the volume of deposits for such an eruption is greater than . Supervolcanoes occur whe ...
underlying
Yellowstone National Park Yellowstone National Park is a List of national parks of the United States, national park of the United States located in the northwest corner of Wyoming, with small portions extending into Montana and Idaho. It was established by the 42nd U ...
in the Rocky Mountains, the
Yellowstone Caldera The Yellowstone Caldera, also known as the Yellowstone Plateau Volcanic Field, is a Quaternary caldera complex and volcanic plateau spanning parts of Wyoming, Idaho, and Montana. It is driven by the Yellowstone hotspot and is largely within Yel ...
, is the continent's largest volcanic feature. Farther west are the rocky
Great Basin The Great Basin () is the largest area of contiguous endorheic watersheds, those with no outlets to the ocean, in North America. It spans nearly all of Nevada, much of Utah, and portions of California, Idaho, Oregon, Wyoming, and Baja Californi ...
and the Chihuahuan, Sonoran, and Mojave deserts. In the northwest corner of
Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...
, carved by the
Colorado River The Colorado River () is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and in northern Mexico. The river, the List of longest rivers of the United States (by main stem), 5th longest in the United St ...
, is the
Grand Canyon The Grand Canyon is a steep-sided canyon carved by the Colorado River in Arizona, United States. The Grand Canyon is long, up to wide and attains a depth of over a mile (). The canyon and adjacent rim are contained within Grand Canyon Nati ...
, a steep-sided canyon and popular tourist destination known for its overwhelming visual size and intricate, colorful landscape. The
Cascade Cascade, or Cascading may refer to: Science and technology Science * Air shower (physics), a cascade (particle shower) of subatomic particles and ionized nuclei ** Particle shower, a cascade of secondary particles produced as the result of a high ...
and
Sierra Nevada The Sierra Nevada ( ) is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primari ...
mountain ranges run close to the
Pacific coast Pacific coast may be used to reference any coastline that borders the Pacific Ocean. Geography Americas North America Countries on the western side of North America have a Pacific coast as their western or south-western border. One of th ...
. The lowest and highest points in the contiguous United States are in the State of California, about apart. At an elevation of , Alaska's
Denali Denali (), federally designated as Mount McKinley, is the highest mountain peak in North America, with a summit elevation of above sea level. It is the tallest mountain in the world from base to peak on land, measuring . On p. 20 of Helm ...
is the highest peak in the country and continent. Active
volcanoes A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often fo ...
are common throughout Alaska's
Alexander Alexander () is a male name of Greek origin. The most prominent bearer of the name is Alexander the Great, the king of the Ancient Greek kingdom of Macedonia who created one of the largest empires in ancient history. Variants listed here ar ...
and
Aleutian Islands The Aleutian Islands ( ; ; , "land of the Aleuts"; possibly from the Chukchi language, Chukchi ''aliat'', or "island")—also called the Aleut Islands, Aleutic Islands, or, before Alaska Purchase, 1867, the Catherine Archipelago—are a chain ...
. Located entirely outside North America, the archipelago of Hawaii consists of volcanic islands, physiographically and ethnologically part of the
Polynesia Polynesia ( , ) is a subregion of Oceania, made up of more than 1,000 islands scattered over the central and southern Pacific Ocean. The indigenous people who inhabit the islands of Polynesia are called Polynesians. They have many things in ...
n subregion of
Oceania Oceania ( , ) is a region, geographical region including Australasia, Melanesia, Micronesia, and Polynesia. Outside of the English-speaking world, Oceania is generally considered a continent, while Mainland Australia is regarded as its co ...
.


Climate

With its large size and geographic variety, the United States includes most climate types. East of the 100th meridian, the climate ranges from
humid continental Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity depe ...
in the north to
humid subtropical A humid subtropical climate is a subtropical -temperate climate type, characterized by long and hot summers, and cool to mild winters. These climates normally lie on the southeast side of all continents (except Antarctica), generally between la ...
in the south. The western Great Plains are
semi-arid A semi-arid climate, semi-desert climate, or steppe climate is a aridity, dry climate sub-type. It is located on regions that receive precipitation below Evapotranspiration#Potential evapotranspiration, potential evapotranspiration, but not as l ...
. Many mountainous areas of the American West have an
alpine climate Alpine climate is the typical climate for elevations above the tree line, where trees fail to grow due to cold. This climate is also referred to as a mountain climate or highland climate. Definition There are multiple definitions of alpine cli ...
. The climate is
arid Aridity is the condition of geographical regions which make up approximately 43% of total global available land area, characterized by low annual precipitation, increased temperatures, and limited water availability.Perez-Aguilar, L. Y., Plata ...
in the Southwest,
Mediterranean The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern ...
in
coastal California Coastal California, also known as the California Coastline and the Golden Coast, refers to the coastal regions of the U.S. state of California. The term is not primarily geographical as it also describes an area distinguished by cultural, economic ...
, and
oceanic Oceanic may refer to: *Of or relating to the ocean *Of or relating to Oceania **Oceanic climate **Oceanic languages **Oceanic person or people, also called "Pacific Islander(s)" Places * Oceanic, British Columbia, a settlement on Smith Island, ...
in coastal
Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...
,
Washington Washington most commonly refers to: * George Washington (1732–1799), the first president of the United States * Washington (state), a state in the Pacific Northwest of the United States * Washington, D.C., the capital of the United States ** A ...
, and southern
Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...
. Most of Alaska is
subarctic The subarctic zone is a region in the Northern Hemisphere immediately south of the true Arctic, north of hemiboreal regions and covering much of Alaska, Canada, Iceland, the north of Fennoscandia, Northwestern Russia, Siberia, and the Cair ...
or
polar Polar may refer to: Geography * Geographical pole, either of the two points on Earth where its axis of rotation intersects its surface ** Polar climate, the climate common in polar regions ** Polar regions of Earth, locations within the polar circ ...
.
Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...
, the southern tip of Florida and U.S. territories in the
Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America ...
and
Pacific The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the cont ...
are
tropical The tropics are the regions of Earth surrounding the equator, where the sun may shine directly overhead. This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's ax ...
. The United States receives more high-impact
extreme weather Extreme weather includes unexpected, unusual, severe weather, severe, or unseasonal weather; weather at the extremes of the historical distribution—the range that has been seen in the past. Extreme events are based on a location's recorded weat ...
incidents than any other country. States bordering the
Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...
are prone to hurricanes, and most of the world's tornadoes occur in the country, mainly in
Tornado Alley Tornado Alley, also known as Tornado Valley, is a loosely defined location of the central United States and, in the 21st century, Canada where tornadoes are most frequent. The term was first used in 1952 as the title of a research project to st ...
. Due to
climate change Present-day climate change includes both global warming—the ongoing increase in Global surface temperature, global average temperature—and its wider effects on Earth's climate system. Climate variability and change, Climate change in ...
, extreme weather has become more frequent in the U.S. in the 21st century, with three times the number of reported
heat waves "Heat Waves" is a song by British indie rock band Glass Animals released as a single from their third studio album ''Dreamland (Glass Animals album), Dreamland'' on 29 June 2020. A sleeper hit, it is the band's signature song and biggest hit sing ...
compared to the 1960s. In the
American Southwest The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural list of regions of the United States, region of the United States that includes Arizona and New Mexico, along with adjacen ...
, droughts became more persistent and more severe. The regions considered as the most attractive to the population are the most vulnerable.


Biodiversity and conservation

The U.S. is one of 17
megadiverse countries A megadiverse country is one of a group of nations that house the majority of Earth's species and high numbers of endemic species. Conservation International identified 17 megadiverse countries in 1998, all of which are located at least parti ...
containing large numbers of
endemic species Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
: about 17,000 species of
vascular plant Vascular plants (), also called tracheophytes (, ) or collectively tracheophyta (; ), are plants that have lignin, lignified tissues (the xylem) for conducting water and minerals throughout the plant. They also have a specialized non-lignified Ti ...
s occur in the contiguous United States and Alaska, and over 1,800 species of
flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (). The term angiosperm is derived from the Ancient Greek, Greek words (; 'container, vessel') and (; 'seed'), meaning that the seeds are enclosed with ...
s are found in Hawaii, few of which occur on the mainland. The United States is home to 428
mammal A mammal () is a vertebrate animal of the Class (biology), class Mammalia (). Mammals are characterised by the presence of milk-producing mammary glands for feeding their young, a broad neocortex region of the brain, fur or hair, and three ...
species, 784 birds, 311 reptiles, 295
amphibian Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excl ...
s, and around 91,000 insect species. There are 63 national parks, and hundreds of other federally managed parks, forests, and
wilderness areas Wilderness or wildlands (usually in the plural) are Earth's natural environments that have not been significantly modified by human activity, or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally ...
, managed by the
National Park Service The National Park Service (NPS) is an List of federal agencies in the United States, agency of the Federal government of the United States, United States federal government, within the US Department of the Interior. The service manages all List ...
and other agencies. About 28% of the country's land is publicly owned and federally managed, primarily in the
Western States The Western world, also known as the West, primarily refers to various nations and states in Western Europe, Northern America, and Australasia; with some debate as to whether those in Eastern Europe and Latin America also constitute the West. ...
. Most of this land is protected, though some is leased for commercial use, and less than one percent is used for military purposes.
Environmental issues in the United States Environmental issues in the United States include climate change, energy, species conservation, invasive species, deforestation, mining, nuclear accidents, pesticides, pollution, waste and over-population. Despite taking hundreds of measures, ...
include debates on
non-renewable resource A non-renewable resource (also called a finite resource) is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption. An example is carbon-based fossil fuels. The original organic mat ...
s and
nuclear energy Nuclear energy may refer to: *Nuclear power, the use of sustained nuclear fission or nuclear fusion to generate heat and electricity *Nuclear binding energy, the energy needed to fuse or split a nucleus of an atom *Nuclear potential energy, the pot ...
, air and water pollution,
biodiversity Biodiversity is the variability of life, life on Earth. It can be measured on various levels. There is for example genetic variability, species diversity, ecosystem diversity and Phylogenetics, phylogenetic diversity. Diversity is not distribut ...
, logging and
deforestation Deforestation or forest clearance is the removal and destruction of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. Ab ...
, and
climate change Present-day climate change includes both global warming—the ongoing increase in Global surface temperature, global average temperature—and its wider effects on Earth's climate system. Climate variability and change, Climate change in ...
. The
U.S. Environmental Protection Agency The Environmental Protection Agency (EPA) is an independent agency of the United States government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on De ...
(EPA) is the federal agency charged with Environmental policy of the United States, addressing most environmental-related issues. The National Wilderness Preservation System, idea of wilderness has shaped the management of public lands since 1964, with the Wilderness Act. The Endangered Species Act of 1973 provides a way to protect threatened and endangered species and their habitats. The United States Fish and Wildlife Service implements and enforces the Act. In 2024, the U.S. ranked 35th among 180 countries in the Environmental Performance Index.


Government and politics

The United States is a
federal republic A federal republic is a federation of Federated state, states with a republican form of government. At its core, the literal meaning of the word republic when used to reference a form of government means a country that is governed by elected re ...
of 50
states State most commonly refers to: * State (polity), a centralized political organization that regulates law and society within a territory **Sovereign state, a sovereign polity in international law, commonly referred to as a country **Nation state, a ...
and a federal capital district,
Washington, D.C. Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...
The U.S. asserts sovereignty over five Territories of the United States, unincorporated territories and United States Minor Outlying Islands, several uninhabited island possessions. It is the world's oldest surviving federation, and its presidential system of national government has been adopted, in whole or in part, by many newly independent states worldwide following their decolonization. The Constitution of the United States serves as Supremacy Clause, the country's supreme legal document. Most scholars describe the United States as a
liberal democracy Liberal democracy, also called Western-style democracy, or substantive democracy, is a form of government that combines the organization of a democracy with ideas of liberalism, liberal political philosophy. Common elements within a liberal dem ...
.Scheb, John M.; Scheb, John M. II (2002). ''An Introduction to the American Legal System''. Florence, Kentucky: Delmar, p. 6. .


National government

Composed of three branches, all headquartered in Washington, D.C., the federal government is the national government of the United States. It is regulated by a strong system of
checks and balances The separation of powers principle functionally differentiates several types of state power (usually law-making, adjudication, and execution) and requires these operations of government to be conceptually and institutionally distinguishabl ...
. * The United States Congress, U.S. Congress, a bicameral legislature made up of the
Senate A senate is a deliberative assembly, often the upper house or chamber of a bicameral legislature. The name comes from the ancient Roman Senate (Latin: ''Senatus''), so-called as an assembly of the senior (Latin: ''senex'' meaning "the el ...
and the
House of Representatives House of Representatives is the name of legislative bodies in many countries and sub-national entities. In many countries, the House of Representatives is the lower house of a bicameral legislature, with the corresponding upper house often ...
. The Senate has 100 members (2 from each state), elected for a six-year term. The House of Representatives has 435 members, each elected for a two-year term; all representatives serve one List of United States congressional districts, congressional district of equivalent population. Congressional districts are drawn by each state legislature and are contiguous within the state. Congress makes federal law, declaration of war, declares war, approves treaties, has the power of the purse, and has Impeachment in the United States, the power of impeachment. One of Congress's foremost non-legislative functions is the power to Congressional investigation, investigate and oversee the executive branch. Congressional oversight is usually delegated to committees and is facilitated by Congress's subpoena power. Much of the work of Congress is performed by a United States congressional committee, collection of committees, each appointed for a specific purpose or duty. Committee membership is by tradition and statute bipartisan. * The U.S. president is the head of state, commander-in-chief of the military, chief executive of the federal government, and has the ability to veto bill (law), legislative bills from the U.S. Congress before they become law. However, Veto power in the United States, presidential vetoes can be overridden by a two-thirds Supermajority#Use in governments around the world, supermajority vote in both chambers of Congress. The president appoints the Cabinet of the United States, members of the Cabinet, subject to Senate approval, and names other officials who administer and enforce federal laws through List of federal agencies in the United States, their respective agencies. The president also has clemency power for federal crimes and Federal pardons in the United States, can issue pardons. Finally, the president has the right to issue expansive "executive orders", subject to Judicial review in the United States, judicial review, in a number of policy areas. Candidates for president campaign with a vice-presidential running mate. Both candidates are elected together, or defeated together, in a presidential election. Unlike other votes in American politics, this is technically an indirect election in which the winner will be determined by the United States Electoral College, U.S. Electoral College. There, votes are officially cast by individual electors selected by State legislature (United States), their state legislature. In practice, however, each of the 50 states chooses a group of presidential electors who are required to confirm the winner of their state's popular vote. Each state is allocated two electors plus one additional elector for each congressional district, which in effect combines to equal the number of elected officials that state sends to Congress. The District of Columbia, with no representatives or senators, is allocated three electoral votes. Both the president and the vice president serve a four-year term, and the president may be Twenty-second Amendment to the United States Constitution, reelected to the office only once, for one additional four-year term. * The Federal judiciary of the United States, U.S. federal judiciary, whose judges are all appointed for life by the president with Senate approval, consists primarily of the Supreme Court of the United States, U.S. Supreme Court, the United States courts of appeals, U.S. courts of appeals, and the United States district court, U.S. district courts. The U.S. Supreme Court interprets laws and judicial review, overturns those it finds unconstitutional. Consisting of nine members led by the Chief Justice of the United States, the court judges each case before it by majority decision. The members are appointed by the sitting president with Senate approval when a vacancy becomes available. The first level in the federal courts is federal district court for any case under "Original jurisdiction#Federal and state courts, original jurisdiction", such as federal statutes, the Constitution, or International treaty, treaties. There are twelve United States Courts of Appeals, federal circuits that divide the country into different regions for federal appeals courts. After a federal district court has decided a case, it can then be Appellate court, appealed to a United States court of appeal. The next and highest court in the system is the Supreme Court of the United States. On average, the Supreme Court receives about 7,000 appeals petitions for writs of certiorari each year, but only grants about 80. The three-branch system is known as the presidential system, in contrast to the parliamentary system, where the executive is part of the legislative body. Many countries around the world adopted this aspect of the 1789 Constitution of the United States, especially in the Americas.


Subdivisions

In the Federalism in the United States, U.S. federal system, sovereign powers are shared between three levels of government specified in the Constitution: the national government, the states, and Indian tribes. The U.S. also asserts sovereignty over five permanently inhabited territories:
American Samoa American Samoa is an Territories of the United States, unincorporated and unorganized territory of the United States located in the Polynesia region of the Pacific Ocean, South Pacific Ocean. Centered on , it is southeast of the island count ...
,
Guam Guam ( ; ) is an island that is an Territories of the United States, organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. Guam's capital is Hagåtña, Guam, Hagåtña, and the most ...
, the Northern Mariana Islands,
Puerto Rico ; abbreviated PR), officially the Commonwealth of Puerto Rico, is a Government of Puerto Rico, self-governing Caribbean Geography of Puerto Rico, archipelago and island organized as an Territories of the United States, unincorporated territo ...
, and the
U.S. Virgin Islands The United States Virgin Islands, officially the Virgin Islands of the United States, are a group of Caribbean islands and a territory of the United States. The islands are geographically part of the Virgin Islands archipelago and are located ...
. Residents of the 50 states are governed by their elected state governments, and by elected Local government in the United States, local governments that are administrative divisions of the states. States are subdivided into counties or county equivalents, and (except for Hawaii) Local government in the United States, further divided into municipalities, each administered by elected representatives. The District of Columbia is Federal district of the United States, a federal district containing the U.S. capital,
Washington, D.C. Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...
The federal district is an administrative division of the federal government. Indian country is made up of 574 federally recognized tribes and List of Indian reservations in the United States, 326 Indian reservations. They hold a government-to-government relationship with the U.S. federal government in Washington and are legally defined as domestic dependent nations with Tribal sovereignty in the United States, inherent tribal sovereignty rights. In addition to the five major territories, the U.S. also asserts sovereignty over the United States Minor Outlying Islands in the
Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...
and the
Caribbean The Caribbean ( , ; ; ; ) is a region in the middle of the Americas centered around the Caribbean Sea in the Atlantic Ocean, North Atlantic Ocean, mostly overlapping with the West Indies. Bordered by North America to the north, Central America ...
. The seven undisputed islands without permanent populations are Baker Island, Howland Island, Jarvis Island, Johnston Atoll, Kingman Reef, Midway Atoll, and Palmyra Atoll. U.S. sovereignty over the unpopulated Bajo Nuevo Bank, Navassa Island, Serranilla Bank, and Wake Island is disputed.


Political parties

The Constitution is silent on political parties. However, they developed independently in the 18th century with the Federalist Party, Federalist and Anti-Federalist Party, Anti-Federalist parties. Since then, the United States has operated as a ''de facto'' two-party system, though the parties in that system have been different at different times. The two main national parties are presently the Democratic and the Republican. The former is perceived as Modern liberalism in the United States, relatively liberal in its political platform while the latter is perceived as Conservatism in the United States, relatively conservative.


Foreign relations

The United States has an established structure of foreign relations, and it has the world's List of countries by number of diplomatic missions, second-largest diplomatic corps . It is a Permanent members of the United Nations Security Council, permanent member of the United Nations Security Council, and home to the Headquarters of the United Nations, United Nations headquarters. The United States is a member of the G7, G20, and
OECD The Organisation for Economic Co-operation and Development (OECD; , OCDE) is an international organization, intergovernmental organization with 38 member countries, founded in 1961 to stimulate economic progress and international trade, wor ...
intergovernmental organizations. List of diplomatic missions in the United States, Almost all countries have embassies and many have consul (representative), consulates (official representatives) in the country. Likewise, nearly all countries host formal diplomatic missions with the United States, except Iran–United States relations, Iran, North Korea–United States relations, North Korea, and Foreign relations of Bhutan#Other countries, Bhutan. Though Taiwan–United States relations, Taiwan does not have formal diplomatic relations with the U.S., it maintains close unofficial relations. The United States regularly Six Assurances, supplies Taiwan with military equipment to deter potential Chinese aggression. Its geopolitical attention also turned to the Indo-Pacific when the United States joined the Quadrilateral Security Dialogue with Australia, India, and Japan. The United States has a "Special Relationship" United Kingdom–United States relations, with the United Kingdom and strong ties Canada–United States relations, with Canada, Australia–United States relations, Australia, New Zealand–United States relations, New Zealand, Philippines–United States relations, the Philippines, Japan–United States relations, Japan, South Korea–United States relations, South Korea, Israel–United States relations, Israel, and several Member state of the European Union, European Union countries (France–United States relations, France, Italy–United States relations, Italy, Germany–United States relations, Germany, Spain–United States relations, Spain, and Poland–United States relations, Poland). The U.S. works closely with its NATO allies on military and national security issues, and with countries in the Americas through the Organization of American States and the United States–Mexico–Canada Agreement, United States–Mexico–Canada Free Trade Agreement. In South America, Colombia is traditionally considered to be the closest ally of the United States. The U.S. exercises full international defense authority and responsibility for Federated States of Micronesia, Micronesia, the Marshall Islands, and Palau through the Compact of Free Association. It has increasingly conducted strategic cooperation India–United States relations, with India, while China–United States relations, its ties with China have steadily deteriorated. Since 2014, the U.S. has Ukraine–United States relations, become a key ally of Ukraine.


Military

The president is the Commander-in-Chief of the United States, commander-in-chief of the United States Armed Forces and appoints its leaders, the United States Secretary of Defense, secretary of defense and the Joint Chiefs of Staff. The United States Department of Defense, Department of Defense, which is headquartered at the Pentagon near Washington, D.C., administers five of the six service branches, which are made up of the United States Army, U.S. Army, United States Marine Corps, Marine Corps, United States Navy, Navy, United States Air Force, Air Force, and United States Space Force, Space Force. The United States Coast Guard, Coast Guard is administered by the United States Department of Homeland Security, Department of Homeland Security in peacetime and can be transferred to the United States Department of the Navy, Department of the Navy in wartime. The United States Military budget of the United States, spent $916 billion on its military in 2023, which is by far the List of countries with highest military expenditures, largest amount of any country, making up 37% of global military spending and accounting for 3.4% of the country's GDP.'''' The U.S. Nuclear weapons of the United States, possesses 42% of the world's nuclear weapons—the second-largest stockpile after Russia and weapons of mass destruction, that of Russia. The United States has the List of countries by number of military and paramilitary personnel, third-largest combined armed forces in the world, behind the People's Liberation Army, Chinese People's Liberation Army and Indian Armed Forces. The military operates about 800 bases and facilities abroad, and maintains United States military deployments, deployments greater than 100 active duty personnel in 25 foreign countries. The United States has engaged in over 400 military interventions since its founding in 1776, with over half of these occurring between 1950 and 2019 and 25% occurring in the post-Cold War era. State defense forces (SDFs) are military units that operate under the sole authority of a state government. SDFs are authorized by state and federal law but are under the command of Governor (United States), the state's governor. They are distinct from the state's National Guard (United States), National Guard units in that they cannot become federalized entities. A state's National Guard personnel, however, may be federalized under the National Defense Act of 1916#National Defense Act Amendments of 1933, National Defense Act Amendments of 1933, which created the Guard and provides for the integration of Army National Guard units and personnel into the U.S. Army and (since 1947) the U.S. Air Force.


Law enforcement and criminal justice

There are about 18,000 U.S. police agencies from local to national level in the United States. Law in the United States is mainly enforced by local police departments and Sheriffs in the United States, sheriff departments in their municipal or county jurisdictions. State police (United States), The state police departments Police power (United States constitutional law), have authority in their respective state, and Federal law enforcement in the United States, federal agencies such as the Federal Bureau of Investigation (FBI) and the United States Marshals Service, U.S. Marshals Service have national jurisdiction and specialized duties, such as protecting civil rights, National security of the United States, national security, enforcing U.S. federal courts' rulings and federal laws, and interstate criminal activity. State court (United States), State courts conduct almost all civil and criminal trials, but federal courts Subject-matter jurisdiction, adjudicate civil and criminal cases relating to federal law. There is no unified "criminal justice system" in the United States. The Incarceration in the United States, American prison system is largely heterogenous, with thousands of relatively independent systems operating across federal, state, local, and tribal levels. In 2025, "these systems hold Incarceration in the United States, nearly 2 million people in 1,566 state prisons, 98 federal prisons, 3,116 local jails, 1,277 juvenile correctional facilities, 133 immigration detention facilities, and 80 Indian country jails, as well as in military prisons, civil commitment centers, state psychiatric hospitals, and prisons in the U.S. territories." Despite disparate systems of confinement, four main institutions dominate: List of United States federal prisons, federal prisons, Lists of United States state prisons, state prisons, local jails, and American juvenile justice system, juvenile correctional facilities. Federal prisons are run by the Federal Bureau of Prisons and hold pretrial detainees as well as people who have been convicted of federal crimes. State prisons, run by the department of corrections of each state, hold people sentenced and serving prison time (usually longer than one year) for felony offenses. Local jails are county or municipal facilities that incarcerate defendants prior to trial; they also hold those serving short sentences (typically under a year). Juvenile correctional facilities are operated by local or state governments and serve as longer-term placements for any minor adjudicated as delinquent and ordered by a judge to be confined. In January 2023, the United States had the List of countries by incarceration rate, sixth-highest per capita incarceration rate in the world—531 people per 100,000 inhabitants—and the largest prison and jail population in the world, with more than 1.9 million people incarcerated.Highest to Lowest
World Prison Brief (WPB). Use the dropdown menu to choose lists of countries by region or the whole world. Use the menu to select highest-to-lowest lists of prison population totals, prison population rates, percentage of pre-trial detainees/remand prisoners, percentage of female prisoners, percentage of foreign prisoners, and occupancy rate. Column headings in WPB tables can be clicked to reorder columns lowest to highest, or alphabetically. For detailed information for each country click on any country name in lists. See th
WPB main data page
and click on the map links or the sidebar links to get to the region and country desired.
An analysis of the World Health Organization Mortality Database from 2010 showed U.S. homicide rates "were 7 times higher than in other high-income countries, driven by Gun deaths in the United States, a gun homicide rate that was 25 times higher".


Economy

The U.S. has a highly developed mixed economy that has been the world's largest nominally since about 1890. Its 2024 gross domestic product (GDP) of more than $29 trillion constituted over 25% of nominal Gross world product, global economic output, or 15% at purchasing power parity (PPP). From 1983 to 2008, U.S. real compounded annual GDP growth was 3.3%, compared to a 2.3% weighted average for the rest of the G7. The country ranks List of countries by GDP (nominal), first in the world by nominal GDP, List of countries by GDP (PPP), second when adjusted for purchasing power parities (PPP), and List of countries by GDP (PPP) per capita, ninth by PPP-adjusted GDP per capita. In February 2024, the total National debt of the United States, U.S. federal government debt was $34.4 trillion. Of the world's Fortune Global 500, 500 largest companies by revenue, List of largest companies in the United States by revenue, 136 were headquartered in the U.S. in 2023, which is the highest number of any country. The United States dollar, U.S. dollar is the currency most used International use of the U.S. dollar, in international transactions and the world's foremost reserve currency, backed by the country's dominant economy, United States Armed Forces, its military, the petrodollar system, its large U.S. Treasury, U.S. treasuries market, and its linked eurodollar. United States dollar#Countries that use US dollar, Several countries use it as their official currency, and in others it is the de facto currency, ''de facto'' currency.Benjamin J. Cohen, ''The Future of Money'', Princeton University Press, 2006, ; ''cf''. "the dollar is the de facto currency in Cambodia", Charles Agar, ''Frommer's Vietnam'', 2006, , p. 17. The U.S. has free trade agreements with Free trade agreements of the United States, several countries, including the United States–Mexico–Canada Agreement, USMCA. It ranked second in the Global Competitiveness Report in 2019, after Singapore. Although the United States has reached a Post-industrial economy, post-industrial level of economic development and is often described as having a service economy, it remains a major industrial power; in 2021, the U.S. manufacturing sector was the world's List of countries by manufacturing output, second-largest after Manufacturing in China, China's. New York City is the world's principal financial center and the epicenter of the world's list of cities by GDP, largest metropolitan economy. The New York Stock Exchange and
Nasdaq The Nasdaq Stock Market (; National Association of Securities Dealers Automated Quotations) is an American stock exchange based in New York City. It is the most active stock trading venue in the U.S. by volume, and ranked second on the list ...
, both located in New York City, are the world's two List of stock exchanges, largest stock exchanges by market capitalization and trade volume.Table A – Market Capitalization of the World's Top Stock Exchanges (As at end of June 2012)
Securities and Exchange Commission (China).
The United States is at or near the forefront of Science and technology in the United States, technological advancement and innovation in many economic fields, especially in artificial intelligence; electronics and computers; pharmaceuticals; and medical, aerospace and military equipment. The country's economy is fueled by abundant natural resources, a well-developed Infrastructure policy of the United States, infrastructure, and List of countries by labour productivity, high productivity.Wright, Gavin, and Jesse Czelusta, "Resource-Based Growth Past and Present", in ''Natural Resources: Neither Curse Nor Destiny'', ed. Daniel Lederman and William Maloney (World Bank, 2007), p. 185. . The List of the largest trading partners of the United States, largest trading partners of the United States are the European Union, Mexico, Canada, China, Japan, South Korea, the United Kingdom, Vietnam, India, and Taiwan. The United States is the world's List of countries by imports, largest importer and List of countries by exports, second-largest exporter. It is by far the world's List of countries by service exports, largest exporter of services. Americans have the highest average Household income, household and List of countries by average wage, employee income among OECD member states, and the fourth-highest Median income, median household income in 2023, up from sixth-highest in 2013. With personal Consumer spending, consumption expenditures of over $18.5 trillion in 2023, the U.S. has a heavily Consumer economy, consumer-driven economy and is the world's List of largest consumer markets, largest consumer market. The U.S. List of countries by number of billionaires, ranked first in the number of dollar billionaires and List of countries by number of millionaires, millionaires in 2023, with 735 billionaires and nearly 22 million millionaires. Wealth in the United States is highly concentrated; in 2011, the richest 10% of the adult population owned 72% of the country's household wealth, while the bottom 50% owned just 2%. U.S. wealth inequality increased substantially since the late 1980s, and Income inequality in the United States, income inequality in the U.S. reached a record high in 2019. By 2024, the country had some of the highest wealth and income inequality levels among
OECD The Organisation for Economic Co-operation and Development (OECD; , OCDE) is an international organization, intergovernmental organization with 38 member countries, founded in 1961 to stimulate economic progress and international trade, wor ...
countries. Since the 1970s, there has been a decoupling of U.S. wage gains from worker productivity. In 2016, the top fifth of earners took home more than half of all income, giving the U.S. one of the widest income distributions among OECD countries. There were about 771,480 Homelessness in the United States, homeless persons in the U.S. in 2024. In 2022, 6.4 million children experienced food insecurity. Feeding America estimates that around one in five, or approximately 13 million, Hunger in the United States#Children, children experience hunger in the U.S. and do not know where they will get their next meal or when. Also in 2022, about 37.9 million people, or 11.5% of the U.S. population, were Poverty in the United States, living in poverty. The United States has a smaller welfare state and redistributes less income through government action than most other World Bank high-income economy, high-income countries. It is the only advanced economy that does not List of statutory minimum employment leave by country, guarantee its workers paid vacation nationally and is one of a few countries in the world without federal Parental leave in the United States, paid family leave as a legal right. The United States has a higher percentage of low-income Working class in the United States, workers than almost any other developed country, largely because of a weak collective bargaining system and lack of government support for at-risk workers.


Science and technology

The United States Technological and industrial history of the United States, has been a leader in technological innovation since the late 19th century and scientific research since the mid-20th century. Methods for producing interchangeable parts and the establishment of a machine tool industry enabled American system of manufacturing, the large-scale manufacturing of U.S. consumer products in the late 19th century. By the early 20th century, factory electrification, the introduction of the assembly line, and other automation, labor-saving techniques created the system of mass production. In the 21st century, the United States continues to be one of the world's foremost scientific powers, though China has emerged as a major competitor in many fields. The U.S. has the List of sovereign states by research and development spending, highest total research and development expenditure of any country and ranks ninth as a percentage of GDP. In 2022, the United States was (after China) the country with the List of countries by number of scientific and technical journal articles, second-highest number of published scientific papers. In 2021, the U.S. ranked second (also after China) by the number of patent applications, and third by trademark and industrial design applications (after China and Germany), according to World Intellectual Property Indicators. In 2023 and 2024, the United States ranked third (after Switzerland and Sweden) in the Global Innovation Index. The United States is considered to be the leading country in the development of artificial intelligence technology. In 2023, the United States was ranked the second most technologically advanced country in the world (after South Korea) by ''Global Finance (magazine), Global Finance'' magazine.


Spaceflight

The United States has maintained a space program since the late 1950s, beginning with the establishment of the NASA, National Aeronautics and Space Administration (NASA) in 1958. NASA's Apollo program (1961–1972) achieved the first crewed Moon landing with the 1969 Apollo 11 mission; it remains one of the agency's most significant milestones. Other major endeavors by NASA include the Space Shuttle program (1981–2011), the Voyager program (1972–present), the Hubble Space Telescope, Hubble and James Webb Space Telescope, James Webb space telescopes (launched in 1990 and 2021, respectively), and the multi-mission Mars Exploration Program (''Mars Exploration Rover, Spirit'' and ''Opportunity (rover), Opportunity'', ''Curiosity (rover), Curiosity,'' and ''Perseverance (rover), Perseverance''). NASA is one of five agencies collaborating on the International Space Station (ISS); U.S. contributions to the ISS include several modules, including ''Destiny (ISS module), Destiny'' (2001), ''Harmony (ISS module), Harmony'' (2007), and ''Tranquility (ISS module), Tranquility'' (2010), as well as ongoing logistical and operational support. The United States private sector dominates the global Private spaceflight, commercial spaceflight industry. Prominent American spaceflight contractors include Blue Origin, Boeing, Lockheed Martin, Northrop Grumman, and SpaceX. NASA programs such as the Commercial Crew Program, Commercial Resupply Services, Commercial Lunar Payload Services, and Next Space Technologies for Exploration Partnerships, NextSTEP have facilitated growing private-sector involvement in American spaceflight.


Energy

In 2023, the United States received approximately 84% of its energy from fossil fuel, and the largest source of the country's energy came from Petroleum in the United States, petroleum (38%), followed by Natural gas in the United States, natural gas (36%), Renewable energy in the United States, renewable sources (9%), Coal in the United States, coal (9%), and Nuclear power in the United States, nuclear power (9%). In 2022, the United States constituted only about 4% of the world population, world's population, but consumed around 16% of the World energy consumption, world's energy. The U.S. ranks as the List of countries by greenhouse gas emissions, second-highest emitter of greenhouse gases behind China. The U.S. is the world's Nuclear power by country, largest producer of nuclear power, generating around 30% of the world's nuclear electricity. It also has the highest number of nuclear power reactors of any country. From 2024, the U.S. plans to triple its nuclear power capacity by 2050.


Transportation

The road network, owned almost entirely by state and local governments, is the List of countries by road network size, longest in the world. The extensive Interstate Highway System connects all major cities and is funded mostly by the federal government but maintained by List of U.S. state and insular area departments of transportation, state departments of transportation, supplemented by state expressways and some private toll roads. The U.S. is among the top ten countries with the List of countries by vehicles per capita, highest vehicle ownership per capita (850 vehicles per 1,000 people) in 2022. A 2022 study found that 76% of U.S. commuters drive alone and 14% ride a bicycle, including bike owners and users of bike-sharing networks. About 11% use some form of public transportation. Public transportation in the United States is well developed in the largest urban areas, notably New York City, Chicago, Boston, Philadelphia, and Portland, Oregon; otherwise, coverage is generally less extensive than in most other developed countries. The U.S. also has many relatively car-dependent localities. Long-distance intercity travel is provided primarily by airlines, but travel by rail is more common along the Northeast Corridor, the only high-speed rail in the United States, high-speed rail in the U.S. that meets international standards. Amtrak, the country's government-sponsored national passenger rail company, has a relatively sparse network compared to that of Western European countries. Service is concentrated in the Northeast, Illinois, and the West Coast. The United States has an extensive air transportation network. List of airlines of the United States, U.S. civilian airlines are all privately owned. The three largest airlines in the world, by total number of passengers carried, are U.S.-based; American Airlines became the global leader after its 2013 merger with US Airways. Among the busiest 50 airports in the world, 16 are in the United States, as well as five of the top 10. The world's busiest airport by passenger volume is Hartsfield–Jackson Atlanta International Airport, Hartsfield–Jackson Atlanta International in Atlanta, Atlanta, Georgia. In 2022, most of the List of airports in the United States, 19,969 U.S. airports were owned and operated by local government authorities, and there are also some private airports. Some 5,193 are designated as "public use", including for general aviation. The Transportation Security Administration has provided security at most major airports since 2001. Rail transport in the United States, The country's rail transport network, the List of countries by rail transport network size, longest in the world at , handles mostly Freight transport, freight (in contrast to more passenger-centered rail in Europe). Because they are often privately owned operations as well, U.S. railroads lag behind those of the rest of the world in terms of electrification. Inland waterways of the United States, The country's inland waterways are the world's List of countries by waterways length, fifth-longest, totaling . They are used extensively for freight, recreation, and a small amount of passenger traffic. Of the world's List of busiest container ports, 50 busiest container ports, four are located in the United States, with the busiest in the U.S. being the Port of Los Angeles.


Demographics


Population

The United States Census Bureau, U.S. Census Bureau reported 331,449,281 residents on April 1, 2020, making the United States the List of countries and dependencies by population, third-most-populous country in the world, after China and India. The Census Bureau's official 2024 population estimate was 340,110,988, an increase of 2.6% since the 2020 census. According to the Bureau's U.S. and World Population Clock, U.S. Population Clock, on July 1, 2024, the U.S. population had a net gain of one person every 16 seconds, or about 5400 people per day. In 2023, 51% of Americans age 15 and over were married, 6% were widowed, 10% were divorced, and 34% had never been married. In 2023, the total fertility rate for the U.S. stood at 1.6 children per woman, and, at 23%, it had the world's highest rate of children living in Single parents in the United States, single-parent households in 2019. The United States has a diverse population; 37 American ancestries, ancestry groups have more than one million members. Non-Hispanic whites, White Americans with ancestry from Europe, the Middle East, or North Africa form the largest race (human classification), racial and ethnic group at 57.8% of the United States population. Hispanic and Latino Americans form the second-largest group and are 18.7% of the United States population. African Americans constitute the country's third-largest ancestry group and are 12.1% of the total U.S. population. Asian Americans are the country's fourth-largest group, composing 5.9% of the United States population. The country's 3.7 million Native Americans account for about 1%, and some 574 native tribes are recognized by the federal government. In 2022, the median age of the United States population was 38.9 years.


Language

While many languages are spoken in the United States, American English, English is by far the most commonly spoken and written. English was made the official language of the United States by Executive Order 14224 in 2025. However, Congress has never passed a bill to designate English as the official language of all three federal branches. Some laws, such as Naturalized citizen of the United States, U.S. naturalization requirements, nonetheless standardize English. Twenty-eight states and the United States Virgin Islands have declared English as the sole official language; 19 states and the District of Columbia have no official language. Three states and four U.S. territories have recognized local or indigenous languages in addition to English: Hawaii (Hawaiian language, Hawaiian), Alaska (Alaska Native languages, twenty Native languages), South Dakota (Sioux language, Sioux), American Samoa (Samoan language, Samoan), Puerto Rico (Spanish language in the United States, Spanish), Guam (Chamorro language, Chamorro), and the Northern Mariana Islands (Carolinian language, Carolinian and Chamorro). In total, 169 Native American languages are spoken in the United States. In Puerto Rico, Spanish is more widely spoken than English. According to the American Community Survey (2020), some 245.4 million people in the U.S. age five and older spoke only English at home. About 41.2 million spoke Spanish at home, making it the second most commonly used language. Other languages spoken at home by one million people or more include Chinese language in the United States, Chinese (3.40 million), Tagalog language in the United States, Tagalog (1.71 million), Vietnamese language in the United States, Vietnamese (1.52 million), Arabic language in the United States, Arabic (1.39 million), French language in the United States, French (1.18 million), Korean language in the United States, Korean (1.07 million), and Russian language in the United States, Russian (1.04 million). German language in the United States, German, spoken by 1 million people at home in 2010, fell to 857,000 total speakers in 2020.


Immigration

America's immigrant population is by far the world's List of sovereign states and dependent territories by immigrant population, largest in absolute terms. In 2022, there were 87.7 million immigrants and Second-generation immigrants in the United States, U.S.-born children of immigrants in the United States, accounting for nearly 27% of the overall U.S. population. In 2017, out of the U.S. foreign-born population, some 45% (20.7 million) were naturalized citizens, 27% (12.3 million) were lawful permanent residents, 6% (2.2 million) were temporary lawful residents, and 23% (10.5 million) were unauthorized immigrants. In 2019, the top countries of origin for immigrants were Mexico (24% of immigrants), India (6%), China (5%), the Philippines (4.5%), and El Salvador (3%). In fiscal year 2022, over one million immigrants (most of whom entered through Chain migration#Legislation, family reunification) were granted Permanent residence (United States), legal residence. In fiscal year 2024 alone, according to the Migration Policy Institute, the United States resettled 100,034 refugees, which "re-cements the United States' role as the top global resettlement destination, far surpassing other major resettlement countries in Europe and Canada".


Religion

The First Amendment to the United States Constitution, First Amendment guarantees the Free Exercise Clause, free exercise of religion in the country and forbids Congress from passing laws respecting Establishment Clause, its establishment. Religious practice is widespread, among the List of countries by ethnic and cultural diversity level, most diverse in the world, and profoundly vibrant. The country has the world's Christianity by country, largest Christian population. It has the Catholic Church by country, fourth-largest population of Roman Catholics; Pope Leo XIV of Chicago, Illinois is their current head. Other notable faiths include Judaism, Buddhism, Hinduism, Islam, many New Age movements, and Native American religions. Religious practice varies significantly by region. "Ceremonial deism" is common in American culture. The overwhelming majority of Americans believe in a Higher Power, higher power or spiritual force, engage in spiritual practices such as prayer, and consider themselves religious or Spirituality, spiritual. In the "Bible Belt", located within the Southern United States, Evangelicalism, evangelical Protestantism plays a significant role culturally, whereas
New England New England is a region consisting of six states in the Northeastern United States: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. It is bordered by the state of New York (state), New York to the west and by the ...
and the Western United States Unchurched Belt, tend to be more secular. Mormonism, a Restorationism, Restorationist movement founded in the U.S. in 1847, is the predominant religion in the state of Utah and a major religion in Idaho.


Urbanization

About 82% of Americans live in United States urban area, urban areas, including suburbs; about half of those reside in cities with populations over 50,000. In 2022, 333 List of United States cities by population, incorporated municipalities had populations over 100,000, nine cities had more than one million residents, and four cities—New York City, Los Angeles, Chicago, and Houston—had populations exceeding two million. Many U.S. metropolitan populations are growing rapidly, particularly in the South and West.


Health

According to the Centers for Disease Control and Prevention (CDC), average American life expectancy at birth was 78.4 years in 2023 (75.8 years for men and 81.1 years for women). This was a gain of 0.9 year from 77.5 years in 2022, and the CDC noted that the new average was largely driven by "decreases in mortality due to COVID-19, heart disease, unintentional injuries, cancer and diabetes". Starting in 1998, life expectancy in the U.S. fell List of countries by life expectancy, behind that of other wealthy industrialized countries, and Americans' "health disadvantage" gap has been increasing ever since. The Commonwealth Fund reported in 2020 that the U.S. had the List of countries by suicide rate, highest suicide rate among high-income countries. Obesity in the United States, Approximately one-third of the U.S. adult population is obese and another third is overweight. The U.S. healthcare system far List of countries by total health expenditure (PPP) per capita, outspends that of any other country, measured both in per capita spending and as a percentage of GDP, but attains worse healthcare outcomes when compared to peer countries for reasons that are debated. The United States is the only developed country Healthcare reform in the United States, without a system of universal healthcare, and Health insurance coverage in the United States, a significant proportion of the population that does not carry health insurance. Government-funded healthcare coverage for the poor (Medicaid) and for those age 65 and older (Medicare (United States), Medicare) is available to Americans who meet the programs' income or age qualifications. In 2010, former President Obama passed the Patient Protection and Affordable Care Act. Abortion in the United States is not federally protected, and is illegal or restricted in 17 states.


Education

American primary and secondary education (known in the U.S. as K–12 education in the United States, K–12, "kindergarten through 12th grade") is decentralized. School systems are operated by state, territorial, and sometimes municipal governments and regulated by the United States Department of Education, U.S. Department of Education. In general, children are required to attend school or Homeschooling in the United States, an approved homeschool from the age of five or six (kindergarten or first grade) until they are 18 years old. This often brings students through the twelfth grade, 12th grade, the final year of a U.S. high school, but some states and territories allow them to leave school earlier, at age 16 or 17. The U.S. spends more on education per student than any other country, an average of $18,614 per year per public elementary and secondary school student in 2020–2021. Among Americans age 25 and older, 92.2% graduated from high school, 62.7% attended some college, 37.7% earned a bachelor's degree, and 14.2% earned a graduate degree. The Literacy in the United States, U.S. literacy rate is near-universal. The country has the List of Nobel laureates by country, most Nobel Prize winners of any country, with List of American Nobel laureates, 411 (having won 413 awards). Higher education in the United States, U.S. tertiary or higher education has earned a global reputation. Many of the world's top universities, as listed by various ranking organizations, are in the United States, including 19 of the top 25. American higher education is dominated by state university systems, although Private universities in the United States, the country's many private universities and colleges enroll about 20% of all American students. Local community colleges generally offer coursework and degree programs covering the first two years of college study. They often have more open admission policies, shorter academic programs, and lower tuition. As for public expenditures on higher education, the U.S. spends more per student than the
OECD The Organisation for Economic Co-operation and Development (OECD; , OCDE) is an international organization, intergovernmental organization with 38 member countries, founded in 1961 to stimulate economic progress and international trade, wor ...
average, and Americans spend more than all nations in combined public and private spending. Colleges and universities directly funded by the federal government do not charge tuition and are limited to military personnel and government employees, including: the United States service academies, U.S. service academies, the Naval Postgraduate School, and US military staff colleges, military staff colleges. Despite some student loan forgiveness programs in place, Student debt, student loan debt increased by 102% between 2010 and 2020, and exceeded $1.7 trillion in 2022.


Culture and society

Americans have traditionally Stereotypes of Americans, been characterized by a unifying political belief in an "American Creed" emphasizing consent of the governed,
liberty Liberty is the state of being free within society from oppressive restrictions imposed by authority on one's way of life, behavior, or political views. The concept of liberty can vary depending on perspective and context. In the Constitutional ...
, equality under the law, democracy, social equality, property rights, and a preference for limited government. Culturally, the country has been described as having Americanism (ideology), the values of individualism and Left-libertarianism, personal autonomy, as well as having a strong work ethic, Competition, competitiveness, and voluntary altruism towards others. According to a 2016 study by the Charities Aid Foundation, Americans donated 1.44% of total GDP to charity—the List of countries by charitable donation, highest rate in the world by a large margin. The United States is home to a Multiculturalism, wide variety of ethnic groups, traditions, and values. The country has acquired significant Hard power, hard and soft power through Foreign relations of the United States, its diplomatic influence,
economic power Economic power refers to the ability of countries, businesses or individuals to make decisions on their own that benefit them. Scholars of international relations also refer to the economic power of a country as a factor influencing its power in ...
, military alliances, and cultural exports such as Cinema of the United States, American movies, Music of the United States, music, Video games in the United States, video games, Sports in the United States, sports, and American cuisine, food. The influence that the United States exerts on other countries through soft power is referred to as Americanization. Nearly all present Americans or their ancestors came from Afro-Eurasia, Europe, Africa, or Asia (the "Old World") within the past five centuries. wikt:mainstream, Mainstream American culture is a Western culture largely derived from the European American#Culture, traditions of European immigrants with influences from many other sources, such as African-American culture, traditions brought by slaves from Africa. More recent immigration from Asian American, Asia and especially Latin American culture, Latin America has added to a cultural mix that has been described as a homogenizing
melting pot A melting pot is a Monoculturalism, monocultural metaphor for a wiktionary:heterogeneous, heterogeneous society becoming more wiktionary:homogeneous, homogeneous, the different elements "melting together" with a common culture; an alternative bei ...
, and a heterogeneous salad bowl (cultural idea), salad bowl, with immigrants contributing to, and often Assimilation (phonology), assimilating into, mainstream American culture. The American Dream, or the perception that Americans enjoy high Socio-economic mobility in the United States, social mobility, plays a key role in attracting immigrants. Whether this perception is accurate has been a topic of debate. While mainstream culture holds that the United States is a classless society, scholars identify significant differences between Social class in the United States, the country's social classes, affecting socialization, language, and values. Americans tend to greatly value socioeconomics, socioeconomic achievement, but Average Joe, being ordinary or average is promoted by some as a noble condition as well. The National Foundation on the Arts and the Humanities is an agency of the United States federal government that was established in 1965 with the purpose to "develop and promote a broadly conceived national policy of support for the humanities and the arts in the United States, and for institutions which preserve the cultural heritage of the United States." It is composed of four sub-agencies: *National Endowment for the Arts *National Endowment for the Humanities *Institute of Museum and Library Services *Federal Council on the Arts and the Humanities Under the First Amendment to the United States Constitution, First Amendment to the Constitution, the United States is considered to have the Freedom of speech in the United States, strongest protections of free speech of any country. Flag desecration in the United States, Flag desecration, Hate speech in the United States, hate speech, Blasphemy law in the United States, blasphemy, and Lèse-majesté, lese majesty are all forms of protected expression. A 2016 Pew Research Center poll found that Americans were the most supportive of free expression of any polity measured. They are the "most supportive of Freedom of the press in the United States, freedom of the press and the Right to Internet access, right to use the Internet without government censorship". The U.S. is a Cultural liberalism, socially progressive country with Permissive society, permissive attitudes surrounding human sexuality. LGBT rights in the United States are, by global standards, among the most advanced.


Literature

Colonial American authors were influenced by John Locke and various other Age of Enlightenment, Enlightenment philosophers. The American Revolution, American Revolutionary Period (1765–1783) is notable for the political writings of
Benjamin Franklin Benjamin Franklin (April 17, 1790) was an American polymath: a writer, scientist, inventor, statesman, diplomat, printer, publisher and Political philosophy, political philosopher.#britannica, Encyclopædia Britannica, Wood, 2021 Among the m ...
,
Alexander Hamilton Alexander Hamilton (January 11, 1755 or 1757July 12, 1804) was an American military officer, statesman, and Founding Fathers of the United States, Founding Father who served as the first U.S. secretary of the treasury from 1789 to 1795 dur ...
,
Thomas Paine Thomas Paine (born Thomas Pain; – In the contemporary record as noted by Conway, Paine's birth date is given as January 29, 1736–37. Common practice was to use a dash or a slash to separate the old-style year from the new-style year. In ...
, and
Thomas Jefferson Thomas Jefferson (, 1743July 4, 1826) was an American Founding Fathers of the United States, Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the United States Declaration of Indepe ...
. Shortly before and after the Revolutionary War, the newspaper rose to prominence, filling a demand for anti-British national literature. An early novel is William Hill Brown's ''The Power of Sympathy'', published in 1791. Writer and critic John Neal in the early- to mid-nineteenth century helped advance America toward a unique literature and culture by criticizing predecessors such as Washington Irving for imitating their British counterparts, and by influencing writers such as Edgar Allan Poe, who took American poetry and short fiction in new directions. Ralph Waldo Emerson and Margaret Fuller pioneered the influential Transcendentalism movement; Henry David Thoreau, author of ''Walden'', was influenced by this movement. The conflict surrounding Abolitionism in the United States, abolitionism inspired writers, like Harriet Beecher Stowe, and authors of slave narratives, such as Frederick Douglass. Nathaniel Hawthorne's ''The Scarlet Letter'' (1850) explored the dark side of American history, as did Herman Melville's ''Moby-Dick'' (1851). Major American poets of the nineteenth century American Renaissance (literature), American Renaissance include Walt Whitman, Melville, and Emily Dickinson. Mark Twain was the first major American writer to be born in the West. Henry James achieved international recognition with novels like ''The Portrait of a Lady'' (1881). As literacy rates rose, periodicals published more stories centered around industrial workers, women, and the rural poor. Naturalism (literature), Naturalism, American literary regionalism, regionalism, and Literary realism#UnitedStates, realism were the major literary movements of the period. While Literary modernism, modernism generally took on an international character, modernist authors working within the United States more often rooted their work in specific regions, peoples, and cultures. Following the Great Migration to northern cities, African-American and black West Indian Americans, West Indian authors of the Harlem Renaissance developed an independent tradition of literature that rebuked a history of inequality and celebrated black culture. An important cultural export during the Jazz Age, these writings were a key influence on ''Négritude'', a philosophy emerging in the 1930s among francophone writers of the African diaspora. In the 1950s, an ideal of homogeneity led many authors to attempt to write the Great American Novel, while the Beat Generation rejected this conformity, using styles that elevated the impact of the spoken word over mechanics to describe drug use, sexuality, and the failings of society. Contemporary literature is more pluralistic than in previous eras, with the closest thing to a unifying feature being a trend toward self-conscious Experimental literature, experiments with language. Twelve American laureates have won the Nobel Prize in Literature.


Mass media

Media in the United States is Censorship in the United States, broadly uncensored, with the First Amendment to the United States Constitution, First Amendment providing significant protections, as reiterated in ''New York Times Co. v. United States''. The four major broadcasters in the U.S. are the National Broadcasting Company (NBC), Columbia Broadcasting System (CBS), American Broadcasting Company (ABC), and Fox Broadcasting Company (FOX). The four major broadcast television networks are all commercial entities. Cable television in the United States, Cable television offers hundreds of channels catering to a variety of niches. In 2021, about 83% of Americans over age 12 listened to radio broadcasting, broadcast radio, while about 40% listened to podcasts. In the prior year, there were 15,460 licensed full-power radio stations in the U.S. according to the Federal Communications Commission (FCC). Much of the public radio broadcasting is supplied by NPR, incorporated in February 1970 under the Public Broadcasting Act of 1967. U.S. newspapers with a global reach and reputation include ''The Wall Street Journal'', ''The New York Times'', ''The Washington Post'', and ''USA Today''. List of Spanish-language newspapers published in the United States, About 800 publications are produced in Spanish. With few exceptions, newspapers are privately owned, either by large chains such as Gannett Company, Gannett or The McClatchy Company, McClatchy, which own dozens or even hundreds of newspapers; by small chains that own a handful of papers; or, in an increasingly rare situation, by individuals or families. Major cities often have alternative newspapers to complement the mainstream daily papers, such as ''The Village Voice'' in New York City and ''LA Weekly'' in Los Angeles. The five most popular websites used in the U.S. are Google Search, Google, YouTube, Amazon (website), Amazon, Yahoo, and Facebook—all of them American-owned. In 2022, the video game market of the United States was the world's List of video games markets by country, largest by revenue. There are 444 publishers, developers, and hardware companies in California alone.


Theater

The United States is well known for its theater. Mainstream theater in the United States derives from the old European theatrical tradition and has been heavily influenced by the Theatre of the United Kingdom, British theater. By the middle of the 19th century America had created new distinct dramatic forms in the Tom Shows, the showboat, showboat theater and the minstrel show. The central hub of the American theater scene is the Theater District, Manhattan, Theater District in Manhattan, with its divisions of Broadway theatre, Broadway, off-Broadway, and off-off-Broadway. Many movie and television Celebrity, celebrities have gotten their big break working in New York productions. Outside New York City, many cities have professional Regional theater in the United States, regional or resident theater companies that produce their own seasons. The biggest-budget theatrical productions are musicals. U.S. theater has an active community theater culture. The Tony Awards recognizes excellence in live Broadway theater and are presented at an annual ceremony in Manhattan. The awards are given for Broadway productions and performances. One is also given for Regional theatre in the United States, regional theater. Several discretionary non-competitive awards are given as well, including a Special Tony Award, the Tony Honors for Excellence in Theatre, and the Isabelle Stevenson Award.


Visual arts

Folk art of the United States, Folk art in Colonial america, colonial America grew out of artisanal Workmanship, craftsmanship in communities that allowed commonly trained people to individually express themselves. It was distinct from Europe's tradition of High culture, high art, which was less accessible and generally less relevant to early American settlers. Cultural movements in art and craftsmanship in colonial America generally lagged behind those of Western Europe. For example, the prevailing medieval style of woodworking and primitive Sculpture of the United States, sculpture became integral to early American folk art, despite the emergence of Renaissance art, Renaissance styles in England in the late 16th and early 17th centuries. The new English styles would have been early enough to make a considerable impact on American folk art, but American styles and forms had already been firmly adopted. Not only did styles change slowly in early America, but there was a tendency for rural artisans there to continue their traditional forms longer than their urban counterparts did—and far longer than those in Western Europe. The Hudson River School was a mid-19th-century movement in the visual arts tradition of European Realism (arts), naturalism. The 1913 Armory Show in New York City, an exhibition of European modern art, modernist art, shocked the public and transformed the U.S. art scene. American Realism and American Regionalism sought to reflect and give America new ways of looking at itself. Georgia O'Keeffe, Marsden Hartley, and others experimented with new and individualistic styles, which would become known as American modernism. Major artistic movements such as the abstract expressionism of Jackson Pollock and Willem de Kooning and the pop art of Andy Warhol and Roy Lichtenstein developed largely in the United States. Major photographers include Alfred Stieglitz, Edward Steichen, Dorothea Lange, Edward Weston, James Van Der Zee, Ansel Adams, and Gordon Parks. The tide of modernism and then postmodernism has brought global fame to American architects, including Frank Lloyd Wright, Philip Johnson, and Frank Gehry. The Metropolitan Museum of Art in Manhattan is the largest art museum in the United States and the List of largest art museums, fourth-largest in the world.


Music

American folk music encompasses numerous music genres, variously known as traditional music, traditional folk music, contemporary folk music, or roots music. Many traditional songs have been sung within the same family or folk group for generations, and sometimes trace back to such origins as the British Isles, mainland Europe, or African-American music, Africa. The rhythmic and lyrical styles of African-American music in particular have influenced American music. Banjos were brought to America through the slave trade. Minstrel shows incorporating the instrument into their acts led to its increased popularity and widespread production in the 19th century. The electric guitar, first invented in the 1930s, and mass-produced by the 1940s, had an enormous influence on popular music, in particular due to the development of rock and roll. The synthesizer, turntablism, and electronic music were also largely developed in the U.S. Elements from folk idioms such as the blues and old-time music were adopted and transformed into popular music, popular genres with global audiences. Jazz grew from blues and ragtime in the early 20th century, developing from the innovations and recordings of composers such as W.C. Handy and Jelly Roll Morton. Louis Armstrong and Duke Ellington increased its popularity early in the 20th century. Country music developed in the 1920s, bluegrass music, bluegrass and rhythm and blues in the 1940s, and rock and roll in the 1950s. In the 1960s, Bob Dylan emerged from the American folk music revival, folk revival to become one of the country's most celebrated songwriters. The musical forms of Punk rock, punk and hip hop both originated in the United States in the 1970s. The United States has the world's List of largest recorded music markets, largest music market, with a total retail value of $15.9 billion in 2022. Most of the world's Record label#Major labels, major record companies are based in the U.S.; they are represented by the Recording Industry Association of America (RIAA). Mid-20th-century American pop stars, such as Frank Sinatra and Elvis Presley, became Superstar, global celebrities and List of best-selling music artists, best-selling music artists, as have artists of the late 20th century, such as Michael Jackson, Madonna, Whitney Houston, and Mariah Carey, and the early 21st century, such as Eminem, Britney Spears, Lady Gaga, Katy Perry, Taylor Swift and Beyoncé.


Fashion

The United States has the world's largest apparel market by revenue. Apart from professional business attire, American fashion is eclectic and predominantly informal. Americans' diverse cultural roots are reflected in their clothing; however, sneakers, jeans, T-shirts, and baseball caps are emblematic of American styles. New York, with New York Fashion Week, its Fashion Week, is considered to be one of the "Big Four" global fashion capitals, along with Paris Fashion Week, Paris, Milan Fashion Week, Milan, and London Fashion Week, London. A study demonstrated that general proximity to Garment District, Manhattan, Manhattan's Garment District has been synonymous with American fashion since its inception in the early 20th century. A number of well-known designer labels, among them Tommy Hilfiger (company), Tommy Hilfiger, Ralph Lauren Corporation, Ralph Lauren, Tom Ford (brand), Tom Ford and Calvin Klein (fashion house), Calvin Klein, are headquartered in Manhattan. Labels cater to niche markets, such as preteens. New York Fashion Week is one of the most influential fashion shows in the world, and is held twice each year in Manhattan; the annual Met Gala, also in Manhattan, has been called the fashion world's "biggest night".


Cinema

The U.S. film industry has Global Hollywood, a worldwide influence and following. Hollywood, Los Angeles, Hollywood, a district in northern Los Angeles, the nation's second-most populous city, is also metonymous for the American filmmaking industry. The major film studios of the United States are the primary source of the List of highest-grossing films, most commercially successful movies selling the most tickets in the world. Largely centered in the New York City region from its beginnings in the late 19th century through the first decades of the 20th century, the U.S. film industry has since been primarily based in and around Hollywood. Nonetheless, American film companies have been subject to the forces of globalization in the 21st century, and an increasing number of films are made elsewhere. The Academy Awards, popularly known as the Oscars, have been held annually by the Academy of Motion Picture Arts and Sciences since 1929, and the Golden Globe Awards have been held annually since January 1944. The industry peaked in what is commonly referred to as the "Classical Hollywood cinema, Golden Age of Hollywood", from the early sound period until the early 1960s, with screen actors such as John Wayne and Marilyn Monroe becoming iconic figures. In the 1970s, "New Hollywood", or the "Hollywood Renaissance", was defined by grittier films influenced by French and Italian realist pictures of the Aftermath of World War II, post-war period. The 21st century has been marked by the rise of American streaming platforms, which came to rival traditional cinema.


Cuisine

Early settlers were introduced by Native Americans to foods such as Turkey as food, turkey, sweet potatoes, maize, corn, Cucurbita, squash, and maple syrup. Of the most enduring and pervasive examples are variations of the native dish called succotash. Early settlers and later immigrants combined these with foods they were familiar with, such as wheat flour, beef, and milk, to create a distinctive American cuisine. New World crops, especially pumpkin, corn, potatoes, and turkey as the main course are part of a shared national menu on Thanksgiving (United States), Thanksgiving, when many Americans prepare or purchase traditional dishes to celebrate the occasion. Characteristic American dishes such as apple pie, fried chicken, doughnuts, french fries, macaroni and cheese, ice cream, hamburgers, hot dogs, and Pizza in the United States, American pizza derive from the recipes of various immigrant groups. Mexican-American cuisine, Mexican dishes such as burritos and tacos preexisted the United States in areas later annexed from Mexico, and American Chinese cuisine, adaptations of Chinese cuisine as well as Italian-American cuisine, pasta dishes freely adapted from Italian sources are all widely consumed. American chefs have had a significant impact on society both domestically and internationally. In 1946, the Culinary Institute of America was founded by Katharine Cramer Angell, Katharine Angell and Frances Roth. This would become the United States' most prestigious culinary school, where many of the most talented American chefs would study prior to successful careers. The United States restaurant industry was projected at $899 billion in sales for 2020, and employed more than 15 million people, representing 10% of the nation's workforce directly. It is the country's second-largest private employer and the third-largest employer overall. The United States is home to over 220 Michelin star-rated restaurants, 70 of which are in New York City alone. American wine, Wine has been produced in what is now the United States since the 1500s, with the New Mexico wine, first widespread production beginning in what is now New Mexico in 1628. In the modern U.S., wine production is undertaken in all fifty states, with California wine, California producing 84 percent of all U.S. wine. With more than under vine, the United States is the List of countries by wine production, fourth-largest wine-producing country in the world, after Italian wine, Italy, Spanish wine, Spain, and French wine, France.T. Stevenson, ''The Sotheby's Wine Encyclopedia'' Fourth Edition, p. 462, Dorling Kindersly, 2005, .J. Robinson, ed. ''The Oxford Companion to Wine'', Third Edition, p. 719; Oxford University Press, 2006, . The American fast-food industry developed alongside the nation's car culture. American restaurants developed the drive-in format in the 1920s, which they began to replace with the drive-through format by the 1940s. American fast-food restaurant chains, such as McDonald's, Burger King, Chick-fil-A, Kentucky Fried Chicken, Dunkin' Donuts and List of fast food restaurant chains#United States, many others, have numerous outlets around the world.


Sports

The most popular spectator sports in the U.S. are American football in the United States, American football, Basketball in the United States, basketball, Baseball in the United States, baseball, Soccer in the United States, soccer, and Ice hockey in the United States, ice hockey. While most major U.S. sports such as baseball and American football have evolved out of European practices, basketball, Volleyball in the United States, volleyball, skateboarding, and snowboarding are American inventions, many of which have become popular worldwide. Lacrosse in the United States, Lacrosse and Surfing in the United States, surfing arose from Native American and Native Hawaiian activities that predate European contact.Liss, Howard. ''Lacrosse'' (Funk & Wagnalls, 1970), p. 13. The Professional sports market in the United States, market for professional sports in the United States was approximately $69 billion in July 2013, roughly 50% larger than that of Europe, the Middle East, and Africa combined. American football is by several measures the most popular spectator sport in the United States; the National Football League has the highest average attendance of any sports league in the world, and the Super Bowl is watched by tens of millions globally. However, baseball has been regarded as the U.S. "national sport" since the late 19th century. After American football, the next four most popular professional team sports are basketball, baseball, soccer, and ice hockey. Their premier leagues are, respectively, the National Basketball Association, Major League Baseball, Major League Soccer, and the National Hockey League. The most-watched individual sports in the U.S. are Golf in the United States, golf and auto racing, particularly NASCAR and IndyCar. On the College athletics in the United States, collegiate level, earnings for the member institutions exceed $1 billion annually, and college football and College basketball, basketball attract large audiences, as the NCAA Division I men's basketball tournament, NCAA March Madness tournament and the College Football Playoff are some of the most watched national sporting events. In the U.S., the intercollegiate sports level serves as a feeder system for professional sports. This differs greatly from practices in nearly all other countries, where publicly and privately funded sports organizations serve this function. Eight Olympic Games have taken place in the United States. The 1904 Summer Olympics in St. Louis, Missouri, were the first-ever Olympic Games held outside of Europe. The Olympic Games will be held in the U.S. for a ninth time when Los Angeles hosts the 2028 Summer Olympics. United States at the Olympics, U.S. athletes have won a total of 2,968 medals (1,179 gold) at the Olympic Games, the most of any country. In international professional competition, the United States men's national soccer team, U.S. men's national soccer team has qualified for United States at the FIFA World Cup, eleven World Cups, while the United States women's national soccer team, women's national team has United States at the FIFA Women's World Cup, won the FIFA Women's World Cup and Football at the Summer Olympics, Olympic soccer tournament four times each. The United States hosted the 1994 FIFA World Cup and will co-host, along with Canada and Mexico, the 2026 FIFA World Cup. The 1999 FIFA Women's World Cup was also hosted by the United States. 1999 FIFA Women's World Cup final, Its final match was watched by 90,185, setting the world record for most-attended women's sporting event at the time.


See also

* Lists of U.S. state topics * Outline of the United States * List of online encyclopedias of U.S. states, encyclopedias typically maintained by state historical societies, universities, or humanities councils


Notes


References


Sources

* * * * * * * * * * * * * * * * * Ebook. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *


External links


Key Development Forecasts for the United States
from International Futures


Government


Official U.S. Government web portal
– gateway to government sites
House
– official website of the United States House of Representatives
Senate
– official website of the United States Senate
White House
– official website of the president of the United States * [ Supreme Court] – official website of the Supreme Court of the United States


History


"Historical Documents"
– website from the National Center for Public Policy Research
"Historical Statistics"
– links to U.S. historical data


Maps


"National Atlas of the United States"
– official maps from the United States Department of the Interior, U.S. Department of the Interior * *
"Measure of America"
– a variety of mapped information relating to health, education, income, safety and demographics in the United States {{Coord, 40, -100, dim:10000000_region:region:US_type:country, name=United States of America, display=title United States, Countries in North America English-speaking countries and territories Federal constitutional republics Former British colonies and protectorates in the Americas Former confederations G20 members Member states of NATO Member states of the United Nations States and territories established in 1776