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International relations (IR, and also referred to as international studies, international politics, or international affairs) is an academic discipline. In a broader sense, the study of IR, in addition to multilateral relations, concerns all activities among states—such as
war War is an armed conflict between the armed forces of states, or between governmental forces and armed groups that are organized under a certain command structure and have the capacity to sustain military operations, or between such organi ...
,
diplomacy Diplomacy is the communication by representatives of State (polity), state, International organization, intergovernmental, or Non-governmental organization, non-governmental institutions intended to influence events in the international syste ...
,
trade Trade involves the transfer of goods and services from one person or entity to another, often in exchange for money. Economists refer to a system or network that allows trade as a market. Traders generally negotiate through a medium of cr ...
, and
foreign policy Foreign policy, also known as external policy, is the set of strategies and actions a State (polity), state employs in its interactions with other states, unions, and international entities. It encompasses a wide range of objectives, includ ...
—as well as relations with and among other international actors, such as
intergovernmental organizations An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own leg ...
(IGOs),
international nongovernmental organizations An international non-governmental organization (INGO) is an organization which is independent of government involvement and extends the concept of a non-governmental organization (NGO) to an international scope. INGOs can admit members affiliated t ...
(INGOs), international legal bodies, and
multinational corporation A multinational corporation (MNC; also called a multinational enterprise (MNE), transnational enterprise (TNE), transnational corporation (TNC), international corporation, or stateless corporation, is a corporate organization that owns and cont ...
s (MNCs). International relations is generally classified as a major multidiscipline of
political science Political science is the scientific study of politics. It is a social science dealing with systems of governance and Power (social and political), power, and the analysis of political activities, political philosophy, political thought, polit ...
, along with
comparative politics Comparative politics is a field in political science characterized either by the use of the '' comparative method'' or other empirical methods to explore politics both within and between countries. Substantively, this can include questions relat ...
,
political methodology Political methodology is a subfield of political science that studies the quantitative and qualitative methods used to study politics and draw conclusions using data. Quantitative methods combine statistics, mathematics, and formal theory. Polit ...
,
political theory Political philosophy studies the theoretical and conceptual foundations of politics. It examines the nature, scope, and legitimacy of political institutions, such as states. This field investigates different forms of government, ranging from d ...
, and
public administration Public administration, or public policy and administration refers to "the management of public programs", or the "translation of politics into the reality that citizens see every day",Kettl, Donald and James Fessler. 2009. ''The Politics of the ...
. It often draws heavily from other fields, including
anthropology Anthropology is the scientific study of humanity, concerned with human behavior, human biology, cultures, society, societies, and linguistics, in both the present and past, including archaic humans. Social anthropology studies patterns of behav ...
,
economics Economics () is a behavioral science that studies the Production (economics), production, distribution (economics), distribution, and Consumption (economics), consumption of goods and services. Economics focuses on the behaviour and interac ...
,
geography Geography (from Ancient Greek ; combining 'Earth' and 'write', literally 'Earth writing') is the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding o ...
,
history History is the systematic study of the past, focusing primarily on the Human history, human past. As an academic discipline, it analyses and interprets evidence to construct narratives about what happened and explain why it happened. Some t ...
,
law Law is a set of rules that are created and are enforceable by social or governmental institutions to regulate behavior, with its precise definition a matter of longstanding debate. It has been variously described as a science and as the ar ...
,
philosophy Philosophy ('love of wisdom' in Ancient Greek) is a systematic study of general and fundamental questions concerning topics like existence, reason, knowledge, Value (ethics and social sciences), value, mind, and language. It is a rational an ...
, and
sociology Sociology is the scientific study of human society that focuses on society, human social behavior, patterns of Interpersonal ties, social relationships, social interaction, and aspects of culture associated with everyday life. The term sociol ...
. There are several
schools of thought A school of thought, or intellectual tradition, is the perspective of a group of people who share common characteristics of opinion or outlook of a philosophy, discipline, belief, social movement, economics, cultural movement, or art movement. ...
within IR, of which the most prominent are
realism Realism, Realistic, or Realists may refer to: In the arts *Realism (arts), the general attempt to depict subjects truthfully in different forms of the arts Arts movements related to realism include: *American Realism *Classical Realism *Liter ...
,
liberalism Liberalism is a Political philosophy, political and moral philosophy based on the Individual rights, rights of the individual, liberty, consent of the governed, political equality, the right to private property, and equality before the law. ...
, and
constructivism Constructivism may refer to: Art and architecture * Constructivism (art), an early 20th-century artistic movement that extols art as a practice for social purposes * Constructivist architecture, an architectural movement in the Soviet Union in t ...
. While international politics has been analyzed since
antiquity Antiquity or Antiquities may refer to: Historical objects or periods Artifacts *Antiquities, objects or artifacts surviving from ancient cultures Eras Any period before the European Middle Ages (5th to 15th centuries) but still within the histo ...
, it did not become a discrete field until 1919, when it was first offered as an undergraduate major by
Aberystwyth University Aberystwyth University () is a Public university, public Research university, research university in Aberystwyth, Wales. Aberystwyth was a founding member institution of the former federal University of Wales. The university has over 8,000 stude ...
in 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 ...
. The
Second World War 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 ...
and its aftermath provoked greater interest and scholarship in international relations, particularly 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 ...
and
Western Europe Western Europe is the western region of Europe. The region's extent varies depending on context. The concept of "the West" appeared in Europe in juxtaposition to "the East" and originally applied to the Western half of the ancient Mediterranean ...
, where it was shaped considerably by the
geostrategic Geostrategy, a subfield of geopolitics, is a type of foreign policy guided principally by geographical factors as they inform, constrain, or affect political and military planning. As with all strategies, geostrategy is concerned with matching me ...
concerns of 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
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 ...
and the subsequent rise of
globalization Globalization is the process of increasing interdependence and integration among the economies, markets, societies, and cultures of different countries worldwide. This is made possible by the reduction of barriers to international trade, th ...
in the late 20th century have presaged new theories and evaluations of the rapidly changing international system.


Terminology

Depending on the academic institution, ''international relations'' or ''international affairs'' is either a subdiscipline of
political science Political science is the scientific study of politics. It is a social science dealing with systems of governance and Power (social and political), power, and the analysis of political activities, political philosophy, political thought, polit ...
or a broader
multidisciplinary An academic discipline or academic field is a subdivision of knowledge that is taught and researched at the college or university level. Disciplines are defined (in part) and recognized by the academic journals in which research is published, ...
field encompassing
global politics Global politics, also known as world politics, names both the discipline that studies the political and economic patterns of the world and the field that is being studied. At the centre of that field are the different processes of political global ...
, law, economics or world history. As a subdiscipline of political science, the focus of IR studies lies on political, diplomatic and security connections among states, as well as the study of modern political world history. In many academic institutions, studies of IR are thus situated in the department of politics/social sciences. This is for example the case in Scandinavia, where international relations are often simply referred to as ''international politics (IP).'' In institutions where ''international relations'' refers to the broader multidisciplinary field of global politics, law, economics and history, the subject may be studied across multiple departments, or be situated in its own department, as is the case at for example the London School of Economics. An undergraduate degree in multidisciplinary international relations may lead to a more specialised master's degree of either international politics, economics, or
international law International law, also known as public international law and the law of nations, is the set of Rule of law, rules, norms, Customary law, legal customs and standards that State (polity), states and other actors feel an obligation to, and generall ...
. In the inaugural issue of ''World Politics'', Frederick S. Dunn wrote that IR was about "relations that take place across national boundaries" and "between autonomous political groups in a world system". Dunn wrote that unique elements characterized IR and separated it from other subfields:
international politics is concerned with the special kind of power relationships that exist in a community lacking an overriding authority; international economics deals with trade relations across national boundaries that are complicated by the uncontrolled actions of sovereign states; and international law is law that is based on voluntary acceptance by independent nations.
The terms "International studies" and "
global studies Global studies (GS) or global affairs (GA) is the interdisciplinary study of global macro-processes. Predominant subjects are political science in the form of global politics, as well as economics, law, the sociology of law, ecology, environmen ...
" have been used by some to refer to a broader multidisciplinary IR field.


History of international relations

Studies of international relations started thousands of years ago;
Barry Buzan Barry Gordon Buzan, FBA, FAcSS (born 28 April 1946) is a British political scientist. He is an Emeritus Professor of International Relations at the London School of Economics and a honorary professor at the University of Copenhagen and Jilin ...
and Richard Little considered the interaction of ancient
Sumer Sumer () is the earliest known civilization, located in the historical region of southern Mesopotamia (now south-central Iraq), emerging during the Chalcolithic and Early Bronze Age, early Bronze Ages between the sixth and fifth millennium BC. ...
ian city-states, starting in 3,500 BC, as the first fully-fledged international system. Analyses of the foreign policies of sovereign city states have been done in ancient times, as in
Thucydides Thucydides ( ; ; BC) was an Classical Athens, Athenian historian and general. His ''History of the Peloponnesian War'' recounts Peloponnesian War, the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been d ...
' analysis of the causes of the
Peloponnesian War The Second Peloponnesian War (431–404 BC), often called simply the Peloponnesian War (), was an Ancient Greece, ancient Greek war fought between Classical Athens, Athens and Sparta and their respective allies for the hegemony of the Ancien ...
between
Athens Athens ( ) is the Capital city, capital and List of cities and towns in Greece, largest city of Greece. A significant coastal urban area in the Mediterranean, Athens is also the capital of the Attica (region), Attica region and is the southe ...
and
Sparta Sparta was a prominent city-state in Laconia in ancient Greece. In antiquity, the city-state was known as Lacedaemon (), while the name Sparta referred to its main settlement in the Evrotas Valley, valley of Evrotas (river), Evrotas rive ...
, as well as by
Niccolò Machiavelli Niccolò di Bernardo dei Machiavelli (3 May 1469 – 21 June 1527) was a Florentine diplomat, author, philosopher, and historian who lived during the Italian Renaissance. He is best known for his political treatise '' The Prince'' (), writte ...
in ''
The Prince ''The Prince'' ( ; ) is a 16th-century political treatise written by the Italian diplomat, philosopher, and Political philosophy, political theorist Niccolò Machiavelli in the form of a realistic instruction guide for new Prince#Prince as gener ...
,'' published in 1532, where he analyzed the foreign policy of the renaissance city state of
Florence Florence ( ; ) is the capital city of the Italy, Italian region of Tuscany. It is also the most populated city in Tuscany, with 362,353 inhabitants, and 989,460 in Metropolitan City of Florence, its metropolitan province as of 2025. Florence ...
. The contemporary field of international relations, however, analyzes the connections existing between
sovereign ''Sovereign'' is a title that can be applied to the highest leader in various categories. The word is borrowed from Old French , which is ultimately derived from the Latin">-4; we might wonder whether there's a point at which it's appropriate to ...
nation-state A nation state, or nation-state, is a political entity in which the state (a centralized political organization ruling over a population within a territory) and the nation (a community based on a common identity) are (broadly or ideally) con ...
s. This makes the establishment of the modern state system the natural starting point of international relations history. The establishment of modern sovereign states as fundamental political units traces back to the
Peace of Westphalia The Peace of Westphalia (, ) is the collective name for two peace treaties signed in October 1648 in the Westphalian cities of Osnabrück and Münster. They ended the Thirty Years' War (1618–1648) and brought peace to the Holy Roman Empire ...
of 1648 in
Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...
. During the preceding
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
, European organization of political authority was based on a vaguely hierarchical religious order. Contrary to popular belief, Westphalia still embodied layered systems of sovereignty, especially within the
Holy Roman Empire The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
. More than the Peace of Westphalia, the
Treaty of Utrecht The Peace of Utrecht was a series of peace treaty, peace treaties signed by the belligerents in the War of the Spanish Succession, in the Dutch city of Utrecht between April 1713 and February 1715. The war involved three contenders for the vac ...
of 1713 is thought to reflect an emerging norm that sovereigns had no internal equals within a defined territory and no external superiors as the ultimate authority within the territory's sovereign borders. These principles underpin the modern international legal and political order. The period between roughly 1500 to 1789 saw the rise of independent
sovereign state A sovereign state is a State (polity), state that has the highest authority over a territory. It is commonly understood that Sovereignty#Sovereignty and independence, a sovereign state is independent. When referring to a specific polity, the ter ...
s,
multilateralism In international relations, multilateralism refers to an alliance of multiple countries pursuing a common goal. Multilateralism is based on the principles of inclusivity, equality, and cooperation, and aims to foster a more peaceful, prosperous, an ...
, and the institutionalization of
diplomacy Diplomacy is the communication by representatives of State (polity), state, International organization, intergovernmental, or Non-governmental organization, non-governmental institutions intended to influence events in the international syste ...
and the military. The French Revolution contributed the idea that it was the citizenry of a state, defined as the nation, that were sovereign, rather than a monarch or noble class. A state wherein the
nation A nation is a type of social organization where a collective Identity (social science), identity, a national identity, has emerged from a combination of shared features across a given population, such as language, history, ethnicity, culture, t ...
is sovereign would thence be termed a nation-state, as opposed to a monarchy or a religious state; the term
republic A republic, based on the Latin phrase ''res publica'' ('public affair' or 'people's affair'), is a State (polity), state in which Power (social and political), political power rests with the public (people), typically through their Representat ...
increasingly became its synonym. An alternative model of the nation-state was developed in reaction to the French republican concept by the Germans and others, who instead of giving the citizenry sovereignty, kept the princes and nobility, but defined nation-statehood in ethnic-linguistic terms, establishing the rarely if ever fulfilled ideal that all people speaking one language should belong to one state only. The same claim to sovereignty was made for both forms of nation-state. In Europe today, few states conform to either definition of nation-state: many continue to have royal sovereigns, and hardly any are ethnically homogeneous. The particular European system supposing the sovereign equality of states was exported to the Americas, Africa, and Asia via
colonialism Colonialism is the control of another territory, natural resources and people by a foreign group. Colonizers control the political and tribal power of the colonised territory. While frequently an Imperialism, imperialist project, colonialism c ...
and the "standards of civilization". The contemporary international system was finally established through
decolonization Decolonization is the undoing of colonialism, the latter being the process whereby Imperialism, imperial nations establish and dominate foreign territories, often overseas. The meanings and applications of the term are disputed. Some scholar ...
during 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 ...
. However, this is somewhat over-simplified. While the nation-state system is considered "modern", many states have not incorporated the system and are termed "pre-modern". A handful of states have moved beyond insistence on full sovereignty, and can be considered "post-modern". The ability of contemporary IR discourse to explain the relations of these different types of states is disputed. "Levels of analysis" is a way of looking at the international system, which includes the individual level, the domestic state as a unit, the international level of transnational and intergovernmental affairs, and the global level. What is explicitly recognized as international relations theory was not developed until after
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 ...
, and is dealt with in more detail below. IR theory, however, has a long tradition of drawing on the work of other
social science Social science (often rendered in the plural as the social sciences) is one of the branches of science, devoted to the study of societies and the relationships among members within those societies. The term was formerly used to refer to the ...
s. The use of capitalizations of the "I" and "R" in international relations aims to distinguish the academic discipline of international relations from the phenomena of international relations. Many cite
Sun Tzu Sun Tzu (; zh, t=孫子, s=孙子, first= t, p=Sūnzǐ) may have been a Chinese General, military general, strategist, philosopher, and writer who lived during the Eastern Zhou period (771–256 BC). Sun Tzu is traditionally credited as the au ...
's ''
The Art of War ''The Art of War'' is an ancient Chinese military treatise dating from the late Spring and Autumn period (roughly 5th century BC). The work, which is attributed to the ancient Chinese military strategist Sun Tzu ("Master Sun"), is compos ...
'' (6th century BC),
Thucydides Thucydides ( ; ; BC) was an Classical Athens, Athenian historian and general. His ''History of the Peloponnesian War'' recounts Peloponnesian War, the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been d ...
' ''
History of the Peloponnesian War The ''History of the Peloponnesian War'' () is a historical account of the Peloponnesian War (431–404 BC), which was fought between the Peloponnesian League (led by Sparta) and the Delian League (led by Classical Athens, Athens). The account, ...
'' (5th century BC),
Chanakya Chanakya (ISO 15919, ISO: ', चाणक्य, ), according to legendary narratives preserved in various traditions dating from the 4th to 11th century CE, was a Brahmin who assisted the first Mauryan emperor Chandragupta Maurya, Chandragup ...
's ''
Arthashastra ''Kautilya's Arthashastra'' (, ; ) is an Ancient Indian Sanskrit treatise on statecraft, politics, economic policy and military strategy. The text is likely the work of several authors over centuries, starting as a compilation of ''Arthashas ...
'' (4th century BC), as the inspiration for realist theory, with
Hobbes Thomas Hobbes ( ; 5 April 1588 – 4 December 1679) was an English philosopher, best known for his 1651 book ''Leviathan'', in which he expounds an influential formulation of social contract theory. He is considered to be one of the founders ...
' ''
Leviathan Leviathan ( ; ; ) is a sea serpent demon noted in theology and mythology. It is referenced in several books of the Hebrew Bible, including Psalms, the Book of Job, the Book of Isaiah, and the pseudepigraphical Book of Enoch. Leviathan is of ...
'' and Machiavelli's ''
The Prince ''The Prince'' ( ; ) is a 16th-century political treatise written by the Italian diplomat, philosopher, and Political philosophy, political theorist Niccolò Machiavelli in the form of a realistic instruction guide for new Prince#Prince as gener ...
'' providing further elaboration. Similarly,
liberalism Liberalism is a Political philosophy, political and moral philosophy based on the Individual rights, rights of the individual, liberty, consent of the governed, political equality, the right to private property, and equality before the law. ...
draws upon the work of
Kant Immanuel Kant (born Emanuel Kant; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, et ...
and
Rousseau Jean-Jacques Rousseau (, ; ; 28 June 1712 – 2 July 1778) was a Genevan philosopher ('' philosophe''), writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects ...
, with the work of the former often being cited as the first elaboration of
democratic peace theory Proponents of democratic peace theory argue that both electoral and republican forms of democracy are hesitant to engage in armed conflict with other identified democracies. Different advocates of this theory suggest that several factors ar ...
. Though contemporary human rights is considerably different from the type of rights envisioned under
natural law Natural law (, ) is a Philosophy, philosophical and legal theory that posits the existence of a set of inherent laws derived from nature and universal moral principles, which are discoverable through reason. In ethics, natural law theory asserts ...
,
Francisco de Vitoria Francisco de Vitoria ( – 12 August 1546; also known as Francisco de Victoria) was a Spanish Roman Catholic philosopher, theologian, and jurist of Renaissance Spain. He is the founder of the tradition in philosophy known as the School of Sala ...
,
Hugo Grotius Hugo Grotius ( ; 10 April 1583 – 28 August 1645), also known as Hugo de Groot () or Huig de Groot (), was a Dutch humanist, diplomat, lawyer, theologian, jurist, statesman, poet and playwright. A teenage prodigy, he was born in Delft an ...
, and
John Locke John Locke (; 29 August 1632 (Old Style and New Style dates, O.S.) – 28 October 1704 (Old Style and New Style dates, O.S.)) was an English philosopher and physician, widely regarded as one of the most influential of the Enlightenment thi ...
offered the first accounts of universal entitlement to certain rights on the basis of common humanity. In the 20th century, in addition to contemporary theories of
liberal internationalism Liberal internationalism is a foreign policy doctrine that supports international institutions, open markets, cooperative security, and liberal democracy. At its core, it holds that states should participate in international institutions that up ...
,
Marxism Marxism is a political philosophy and method of socioeconomic analysis. It uses a dialectical and materialist interpretation of historical development, better known as historical materialism, to analyse class relations, social conflict, ...
has been a foundation of international relations.


Emergence as academic discipline

International relations as a distinct field of study began in
Britain Britain most often refers to: * Great Britain, a large island comprising the countries of England, Scotland and Wales * The United Kingdom of Great Britain and Northern Ireland, a sovereign state in Europe comprising Great Britain and the north-eas ...
. IR emerged as a formal
academic discipline An academic discipline or academic field is a subdivision of knowledge that is taught and researched at the college or university level. Disciplines are defined (in part) and recognized by the academic journals in which research is published, a ...
in 1919 with the founding of the first IR professorship: the Woodrow Wilson Chair at
Aberystwyth Aberystwyth (; ) is a University town, university and seaside town and a community (Wales), community in Ceredigion, Wales. It is the largest town in Ceredigion and from Aberaeron, the county's other administrative centre. In 2021, the popula ...
,
University of Wales The University of Wales () is a confederal university based in Cardiff, Wales. Founded by royal charter in 1893 as a federal university with three constituent colleges – Aberystwyth, Bangor and Cardiff – the university was the first universit ...
(now
Aberystwyth University Aberystwyth University () is a Public university, public Research university, research university in Aberystwyth, Wales. Aberystwyth was a founding member institution of the former federal University of Wales. The university has over 8,000 stude ...
), held by
Alfred Eckhard Zimmern Sir Alfred Eckhard Zimmern (26 January 1879 – 24 November 1957) was an English classical scholar, historian, and political scientist writing on international relations. A British policymaker during World War I and a prominent liberal thinker, ...
and endowed by David Davies. International politics courses were established at the University of Wisconsin in 1899 by
Paul Samuel Reinsch Paul Samuel Reinsch (June 10, 1869 – January 26, 1923), was an American political scientist and diplomat. He played an influential role in developing the field of international relations. He helped form the American Political Science Associatio ...
and at Columbia University in 1910. By 1920, there were four universities that taught courses on
international organization An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own le ...
.
Georgetown University Georgetown University is a private university, private Jesuit research university in Washington, D.C., United States. Founded by Bishop John Carroll (archbishop of Baltimore), John Carroll in 1789, it is the oldest Catholic higher education, Ca ...
's
Walsh School of Foreign Service The Edmund A. Walsh School of Foreign Service (SFS) is the school of international relations at Georgetown University in Washington, D.C. It grants degrees at both Undergraduate education, undergraduate and Postgraduate education, graduate lev ...
is the oldest continuously operating school for international affairs in the United States, founded in 1919. In 1927, the
London School of Economics The London School of Economics and Political Science (LSE), established in 1895, is a public research university in London, England, and a member institution of the University of London. The school specialises in the social sciences. Founded ...
' department of international relations was founded at the behest of
Nobel Peace Prize The Nobel Peace Prize (Swedish language, Swedish and ) is one of the five Nobel Prizes established by the Will and testament, will of Sweden, Swedish industrialist, inventor, and armaments manufacturer Alfred Nobel, along with the prizes in Nobe ...
winner
Philip Noel-Baker Philip John Noel-Baker, Baron Noel-Baker, (1 November 1889 – 8 October 1982), born Philip John Baker, was a British politician, diplomat, academic, athlete, and renowned campaigner for disarmament. He carried the British team flag and won a s ...
: this was the first institute to offer a wide range of degrees in the field. That same year, the
Graduate Institute of International and Development Studies The Graduate Institute of International and Development Studies (, abbreviated IHEID), commonly referred to as Geneva Graduate Institute, is a graduate-level research university in Geneva, Switzerland dedicated to international relations, dev ...
, a school dedicated to teaching international affairs, was founded in
Geneva Geneva ( , ; ) ; ; . is the List of cities in Switzerland, second-most populous city in Switzerland and the most populous in French-speaking Romandy. Situated in the southwest of the country, where the Rhône exits Lake Geneva, it is the ca ...
, Switzerland. This was rapidly followed by establishment of IR at universities in the US. The creation of the posts of
Montague Burton Professor of International Relations The Montague Burton Professorship of International Relations is a named chair at the University of Oxford and the London School of Economics, and a former chair at the University of Edinburgh. Created by the endowment of Montague Burton in UK un ...
at LSE and at Oxford gave further impetus to the academic study of international relations. Furthermore, the International History department at LSE developed a focus on the history of IR in the
early modern The early modern period is a Periodization, historical period that is defined either as part of or as immediately preceding the modern period, with divisions based primarily on the history of Europe and the broader concept of modernity. There i ...
, colonial, and
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 ...
periods. The first university entirely dedicated to the study of IR was the
Graduate Institute of International and Development Studies The Graduate Institute of International and Development Studies (, abbreviated IHEID), commonly referred to as Geneva Graduate Institute, is a graduate-level research university in Geneva, Switzerland dedicated to international relations, dev ...
, which was founded in 1927 to form diplomats associated to the
League of Nations The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
. In 1922,
Georgetown University Georgetown University is a private university, private Jesuit research university in Washington, D.C., United States. Founded by Bishop John Carroll (archbishop of Baltimore), John Carroll in 1789, it is the oldest Catholic higher education, Ca ...
graduated its first class of the
Master of Science in Foreign Service This list refers to specific master's degrees in North America. Please see master's degree for a more general overview. Accountancy Master of Accountancy (MAcc, MAc, MAcy or MPAcc), alternatively Master of Professional Accountancy (MPAcy or M ...
(MSFS) degree, making it the first international relations graduate program in the United States. This was soon followed by the establishment of the Committee on International Relations (CIR) at the
University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...
, where the first research
graduate degree Postgraduate education, graduate education, or graduate school consists of academic or professional degrees, certificates, diplomas, or other qualifications usually pursued by post-secondary students who have earned an undergraduate (bachelor ...
was conferred in 1928. The
Fletcher School of Law and Diplomacy The Fletcher School of Law and Diplomacy is the graduate school of international affairs of Tufts University, in Medford, Massachusetts. Fletcher is one of America's oldest graduate schools of international relations. As of 2017, the student bo ...
, a collaboration between
Tufts University Tufts University is a private research university in Medford and Somerville, Massachusetts, United States, with additional facilities in Boston and Grafton, as well as Talloires, France. Tufts also has several Doctor of Physical Therapy p ...
and
Harvard University Harvard University is a Private university, private Ivy League research university in Cambridge, Massachusetts, United States. Founded in 1636 and named for its first benefactor, the History of the Puritans in North America, Puritan clergyma ...
, opened its doors in 1933 as the first graduate-only school of international affairs in the United States. In 1965,
Glendon College Glendon College is a public liberal arts college in Toronto, Ontario, Canada. Formally the federated bilingual campus of York University, it is one of the school's nine colleges and 11 faculties with 100 full-time faculty members and a student po ...
and the
Norman Paterson School of International Affairs The Norman Paterson School of International Affairs (NPSIA ( )) is a professional school of international affairs at Carleton University that was founded in 1965. The school is based at Richcraft Hall on Carleton's campus in Ottawa, Ontario, C ...
were the first institutions in Canada to offer an undergraduate and a graduate program in international studies and affairs, respectively. The lines between IR and other political science subfields is sometimes blurred, in particular when it comes to the study of conflict,
institutions An institution is a humanly devised structure of rules and norms that shape and constrain social behavior. All definitions of institutions generally entail that there is a level of persistence and continuity. Laws, rules, social conventions and ...
,
political economy Political or comparative economy is a branch of political science and economics studying economic systems (e.g. Marketplace, markets and national economies) and their governance by political systems (e.g. law, institutions, and government). Wi ...
and
political behavior Theories of political behavior, as an aspect of political science, attempt to quantify and explain the influences that define a person's political views, ideology, and levels of political participation, especially in relation to the role of ...
. The division between
comparative politics Comparative politics is a field in political science characterized either by the use of the '' comparative method'' or other empirical methods to explore politics both within and between countries. Substantively, this can include questions relat ...
and international relations is artificial, as processes within nations shape international processes, and international processes shape processes within states. Some scholars have called for an integration of the fields. Comparative politics does not have similar " isms" as international relations scholarship. Critical scholarship in international relations has explored the relationship between the
institutionalization In sociology, institutionalisation (or institutionalization) is the process of embedding some conception (for example a belief, norm, social role, particular value or mode of behavior) within an organization, social system, or society as a w ...
of IR as an academic discipline and the demands of national governments. 's book ''White World Order, Black Power Politics'' details the historical imbrication of IR in the projects of colonial administration and imperialism, while other scholars have traced the emergence of international relations in relation to the consolidation of newly independent nation-states within the non-West, such as Brazil and India.


Theory

Within the study of international relations, there exists multiple theories seeking to explain how states and other actors operate within the international system. These can generally be divided into three main strands: realism, liberalism, and constructivism.


Realism

The realist framework of international relations rests on the fundamental assumption that the international state system is an
anarchy Anarchy is a form of society without rulers. As a type of stateless society, it is commonly contrasted with states, which are centralized polities that claim a monopoly on violence over a permanent territory. Beyond a lack of government, it can ...
, with no overarching power restricting the behaviour of sovereign states. As a consequence, states are engaged in a continuous power struggle, where they seek to augment their own military capabilities, economic power, and diplomacy relative to other states; this in order to ensure the protection of their political system, citizens, and vital interests. The realist framework further assumes that states act as unitary, rational actors, where central decision makers in the state apparatus ultimately stand for most of the state's foreign policy decisions. International organizations are in consequence merely seen as tools for individual states used to further their own interests, and are thought to have little power in shaping states' foreign policies on their own. The realist framework is traditionally associated with the analysis of power politics, and has been used to analyze the conflicts between states in the early European state system; the causes of the
First First most commonly refers to: * First, the ordinal form of the number 1 First or 1st may also refer to: Acronyms * Faint Images of the Radio Sky at Twenty-Centimeters, an astronomical survey carried out by the Very Large Array * Far Infrared a ...
and
Second World Wars 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 ...
, as well as the behavior of the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
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 ...
during 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 ...
. In settings such as these, the realist framework carries great interpretative insights in explaining how the military and economic power struggles of states lead to larger armed conflicts.


History of realism

''
History of the Peloponnesian War The ''History of the Peloponnesian War'' () is a historical account of the Peloponnesian War (431–404 BC), which was fought between the Peloponnesian League (led by Sparta) and the Delian League (led by Classical Athens, Athens). The account, ...
'', written by
Thucydides Thucydides ( ; ; BC) was an Classical Athens, Athenian historian and general. His ''History of the Peloponnesian War'' recounts Peloponnesian War, the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been d ...
, is considered a foundational text of the realist school of political philosophy. There is debate over whether Thucydides himself was a realist; Richard Ned Lebow has argued that seeing Thucydides as a realist is a misinterpretation of a more complex political message within his work. Amongst others, philosophers like Machiavelli,
Hobbes Thomas Hobbes ( ; 5 April 1588 – 4 December 1679) was an English philosopher, best known for his 1651 book ''Leviathan'', in which he expounds an influential formulation of social contract theory. He is considered to be one of the founders ...
, and
Rousseau Jean-Jacques Rousseau (, ; ; 28 June 1712 – 2 July 1778) was a Genevan philosopher ('' philosophe''), writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects ...
are considered to have contributed to the realist philosophy. However, while their work may support realist doctrine, it is not likely that they would have classified themselves as realists in this sense. Political realism believes that politics, like society, is governed by objective laws with roots in
human nature Human nature comprises the fundamental dispositions and characteristics—including ways of Thought, thinking, feeling, and agency (philosophy), acting—that humans are said to have nature (philosophy), naturally. The term is often used to denote ...
. To improve society, it is first necessary to understand the laws by which society lives. The operation of these laws being impervious to our preferences, persons will challenge them only at the risk of failure. Realism, believing as it does in the objectivity of the laws of politics, must also believe in the possibility of developing a rational theory that reflects, however imperfectly and one-sidedly, these objective laws. It believes also, then, in the possibility of distinguishing in politics between truth and opinion—between what is true objectively and rationally, supported by evidence and illuminated by reason, and what is only a subjective judgment, divorced from the facts as they are and informed by prejudice and wishful thinking. Major theorists include E. H. Carr,
Robert Gilpin Robert Gilpin (; July 2, 1930 – June 20, 2018) was an American political scientist. He was Professor of Politics and International Affairs at the Woodrow Wilson School of Public and International Affairs at Princeton University where he held ...
,
Charles P. Kindleberger Charles Poor Kindleberger (October 12, 1910 – July 7, 2003) was an American economic historian and author of over 30 books. His 1978 book ''Manias, Panics, and Crashes'', about speculative stock market bubbles, was reprinted in 2000 after the ...
, Stephen D. Krasner,
Hans Morgenthau Hans Joachim Morgenthau (February 17, 1904 – July 19, 1980) was a German-American jurist and political scientist who was one of the major 20th-century figures in the study of international relations. Morgenthau's works belong to the tradition ...
,
Kenneth Waltz Kenneth Neal Waltz (; June 8, 1924 – May 12, 2013) was an American political scientist who was a member of the faculty at both the University of California, Berkeley, and Columbia University and one of the most prominent scholars in the field ...
,
Robert Jervis Robert Jervis (April 30, 1940 – December 9, 2021) was an American political scientist who was the Adlai E. Stevenson Professor of International Politics in the Department of Political Science at Columbia University. Jervis was co-editor of the ...
,
Stephen Walt Stephen Martin Walt (born July 2, 1955) is an American political scientist serving as the Robert and Renee Belfer Professor of international relations at the Harvard Kennedy School. A member of the realist school of international relations, Walt ...
, and
John Mearsheimer John Joseph Mearsheimer (; born December 14, 1947) is an American political scientist and international relations scholar. He is R. Wendell Harrison Distinguished Service Professor in the University of Chicago. Mearsheimer is best known for dev ...
.


Liberalism

In contrast to realism, the liberal framework emphasises that states, although they are sovereign, do not exist in a purely anarchical system. Rather, liberal theory assumes that states are institutionally constrained by the power of international organisations, and mutually dependent on one another through economic and diplomatic ties. Institutions such as the
United Nations The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...
, the
World Trade Organisation The World Trade Organization (WTO) is an intergovernmental organization headquartered in Geneva, Switzerland that regulates and facilitates international trade. Governments use the organization to establish, revise, and enforce the rules that g ...
(WTO), and the
International Court of Justice The International Court of Justice (ICJ; , CIJ), or colloquially the World Court, is the only international court that Adjudication, adjudicates general disputes between nations, and gives advisory opinions on International law, internation ...
are taken to, over time, have developed power and influence to shape the foreign policies of individual states. Furthermore, the existence of the globalised
world economy The world economy or global economy is the economy of all humans in the world, referring to the global economic system, which includes all economic activities conducted both within and between nations, including production (economics), producti ...
makes continuous military power struggle irrational, as states are dependent on participation in the global trade system to ensure their own survival. As such, the liberal framework stresses cooperation between states as a fundamental part of the international system. States are not seen as unitary actors, but pluralistic arenas where interest groups, non-governmental organisations, and economic actors also shape the creation of foreign policy.Mingst, Karen A., & Arreguín-Toft, Ivan M. (2011). Essentials of International Relations (5th ed.). New York: W. W. Norton & Company. The liberal framework is associated with analysis of the globalised world as it emerged in the aftermath 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 ...
. Increased political cooperation through organisations such as the UN, as well as economic cooperation through institutions such as the WTO, the World Bank and the
International Monetary Fund The International Monetary Fund (IMF) is a major financial agency of the United Nations, and an international financial institution funded by 191 member countries, with headquarters in Washington, D.C. It is regarded as the global lender of las ...
, was thought to have made the realist analysis of power and conflict inadequate in explaining the workings of the international system.


History of liberalism

The intellectual basis of liberal theory is often cited as
Immanuel Kant Immanuel Kant (born Emanuel Kant; 22 April 1724 – 12 February 1804) was a German Philosophy, philosopher and one of the central Age of Enlightenment, Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works ...
's essay ''Perpetual Peace'' from 1795. In it, he postulates that states, over time, through increased political and economic cooperation, will come to resemble an international federation—a
world government World government is the concept of a single political authority governing all of Earth and humanity. It is conceived in a variety of forms, from tyrannical to democratic, which reflects its wide array of proponents and detractors. There has ...
; which will be characterised by continual peace and cooperation. In modern times,
liberal international relations theory Liberalism is a school of thought within international relations theory which revolves around three interrelated principles: * Rejection of power politics as the only possible outcome of international relations; it questions security/warfare pr ...
arose after
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 ...
in response to the ability of states to control and limit war in their international relations. Early adherents include
Woodrow Wilson Thomas Woodrow Wilson (December 28, 1856February 3, 1924) was the 28th president of the United States, serving from 1913 to 1921. He was the only History of the Democratic Party (United States), Democrat to serve as president during the Prog ...
and
Norman Angell Sir Ralph Norman Angell (26 December 1872 – 7 October 1967) was an English Nobel Peace Prize winner. He was a lecturer, journalist, author and Member of Parliament for the Labour Party. Angell was one of the principal founders of the Union ...
, who argued that states mutually gained from cooperation and that war was so destructive as to be essentially futile. Liberalism was not recognized as a coherent theory as such until it was collectively and derisively termed idealism by E. H. Carr. A new version of "idealism" that focused on
human rights Human rights are universally recognized Morality, moral principles or Social norm, norms that establish standards of human behavior and are often protected by both Municipal law, national and international laws. These rights are considered ...
as the basis of the legitimacy of
international law International law, also known as public international law and the law of nations, is the set of Rule of law, rules, norms, Customary law, legal customs and standards that State (polity), states and other actors feel an obligation to, and generall ...
was advanced by
Hans Köchler Hans Köchler (born 18 October 1948) is a retired professor of philosophy at the University of Innsbruck, Austria, and president of the International Progress Organization, a non-governmental organization in consultative status with the United N ...
. Major theorists include
Montesquieu Charles Louis de Secondat, baron de La Brède et de Montesquieu (18 January 168910 February 1755), generally referred to as simply Montesquieu, was a French judge, man of letters, historian, and political philosopher. He is the principal so ...
,
Immanuel Kant Immanuel Kant (born Emanuel Kant; 22 April 1724 – 12 February 1804) was a German Philosophy, philosopher and one of the central Age of Enlightenment, Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works ...
,
Michael W. Doyle Michael W. Doyle (born 1948) is an American international relations scholar who is a theorist of the liberal " democratic peace" and author of ''Liberalism and World Politics''. He has also written on the comparative history of empires and the ...
,
Francis Fukuyama Francis Yoshihiro Fukuyama (; born October 27, 1952) is an American political scientist, political economist, and international relations scholar, best known for his book '' The End of History and the Last Man'' (1992). In this work he argues th ...
, and Helen Milner.


Liberal institutionalism

Liberal institutionalism Liberal institutionalism (or institutional liberalism or neoliberalism) is a theory of international relations that holds that international cooperation between states is feasible and sustainable, and that such cooperation can reduce conflict and ...
(some times referred to as neoliberalism) shows how cooperation can be achieved in international relations even if neorealist assumptions apply (states are the key actors in world politics, the international system is anarchic, and states pursue their self interest). Liberal institutionalists highlight the role of
international institutions An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own leg ...
and
regimes In politics, a regime (also spelled régime) is a system of government that determines access to public office, and the extent of power held by officials. The two broad categories of regimes are democratic and autocratic. A key similarity across ...
in facilitating cooperation between states. Prominent neoliberal institutionalists are
John Ikenberry Gilford John Ikenberry (October 5, 1954) is an American political scientist. He is the Albert G. Milbank Professor of Politics and International Affairs at Princeton University. Known for his work on international relations theories, such as boo ...
,
Robert Keohane Robert Owen Keohane (born October 3, 1941) is an American political scientist working in the fields of international relations and international political economy. Following the publication of his influential book '' After Hegemony'' (1984), he h ...
, and
Joseph Nye Joseph Samuel Nye Jr. (January 19, 1937 – May 6, 2025) was an American political scientist. He and Robert Keohane co-founded the international relations theory of neoliberalism, which they developed in their 1977 book ''Power and Interdepe ...
. Robert Keohane's 1984 book ''
After Hegemony ''After Hegemony'' (full title: ''After Hegemony: Cooperation and Discord in the World Political Economy'') is a book by Robert Keohane first published in 1984. It is a leading text in the liberal institutionalist international relations scholar ...
'' used insights from the
new institutional economics New Institutional Economics (NIE) is an economic perspective that attempts to extend economics by focusing on the institutions (that is to say the social and legal norms and rules) that underlie economic activity and with analysis beyond earlier ...
to argue that the international system could remain stable in the absence of a hegemon, thus rebutting hegemonic stability theory.


=Regime theory

= Regime theory is derived from the liberal tradition that argues that international institutions or regimes affect the behaviour of states (or other international actors). It assumes that cooperation is possible in the anarchic system of states, indeed, regimes are by definition, instances of international cooperation. While
realism Realism, Realistic, or Realists may refer to: In the arts *Realism (arts), the general attempt to depict subjects truthfully in different forms of the arts Arts movements related to realism include: *American Realism *Classical Realism *Liter ...
predicts that conflict should be the norm in international relations, regime theorists say that there is cooperation despite anarchy. Often they cite cooperation in trade, human rights and
collective security Collective security is arrangement between states in which the institution accepts that an attack on one state is the concern of all and merits a collective response to threats by all. Collective security was a key principle underpinning the Lea ...
among other issues. These instances of cooperation are regimes. The most commonly cited definition of regimes comes from Stephen Krasner, who defines regimes as "principles, norms, rules, and decision-making procedures around which actor expectations converge in a given issue-area". Not all approaches to regime theory, however, are liberal or neoliberal; some realist scholars like
Joseph Grieco Joseph M. Grieco (born 1953) is an American political scientist. He is a professor of political science at Duke University, in Durham, North Carolina. Within international relations theory he is a neorealist and is a key figure in the debate bet ...
have developed hybrid theories which take a realist based approach to this fundamentally liberal theory. (Realists do not say cooperation ''never'' happens, just that it is not the norm; it is a difference of degree).


Constructivism

The constructivist framework rests on the fundamental assumption that the international system is built on social constructs; such as
idea In philosophy and in common usage, an idea (from the Greek word: ἰδέα (idea), meaning 'a form, or a pattern') is the results of thought. Also in philosophy, ideas can also be mental representational images of some object. Many philosophe ...
s, norms, and identities. Various political actors, such as state leaders,
policy makers Policy is a deliberate system of guidelines to guide decisions and achieve rational outcomes. A policy is a statement of intent and is implemented as a procedure or protocol. Policies are generally adopted by a governance body within an organ ...
, and the leaders of international organisations, are socialised into different roles and systems of norms, which define how the international system operates. The constructivist scholar
Alexander Wendt Alexander Wendt (born 12 June 1958) is an American political scientist and a founding figure of social constructivism in the field of international relations, and a key contributor to quantum social science. Wendt and academics such as Nicholas ...
, in a 1992 article in ''
International Organization An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own le ...
,'' noted in response to realism that "anarchy is what states make of it". By this he means that the anarchic structure that realists claim governs state interaction is in fact a phenomenon that is socially constructed and reproduced by states. Constructivism is part of critical theory, and as such seeks to criticise the assumptions underlying traditional IR theory. Constructivist theory would for example claim that the state leaders of the United States and Soviet Union were socialised into different roles and norms, which can provide theoretical insights to how the conflict between the nations was conducted during the Cold War. E.g., prominent US policy makers frequently spoke of the USSR as an 'evil empire', and thus socialised the US population and state apparatus into an anti-communist sentiment, which defined the norms conducted in US foreign policy. Other constructivist analyses include the discourses on European integration; senior policy-making circles were socialised into ideas of Europe as an historical and cultural community, and therefore sought to construct institutions to integrate European nations into a single political body. Constructivism is also present in the analysis of
international law International law, also known as public international law and the law of nations, is the set of Rule of law, rules, norms, Customary law, legal customs and standards that State (polity), states and other actors feel an obligation to, and generall ...
, where norms of conduct such as the prohibition of
chemical weapon A chemical weapon (CW) is a specialized munition that uses chemicals formulated to inflict death or harm on humans. According to the Organisation for the Prohibition of Chemical Weapons (OPCW), this can be any chemical compound intended as ...
s,
torture Torture is the deliberate infliction of severe pain or suffering on a person for reasons including corporal punishment, punishment, forced confession, extracting a confession, interrogational torture, interrogation for information, or intimid ...
, and the protection of civilians in war, are socialised into international organisations, and stipulated into rules. Prominent constructivist IR scholars include Michael Barnett,
Martha Finnemore Martha Finnemore (born 1959) is an American constructivist scholar of international relations, and professor at the Elliott School of International Affairs at George Washington University. She is considered among the most influential international ...
, Ted Hopf,
Peter Katzenstein Peter Joachim Katzenstein FBA (born February 17, 1945) is a German-American political scientist. He is the Walter S. Carpenter, Jr. Professor of International Studies at Cornell University. Katzenstein has made influential contributions to the ...
,
Kathryn Sikkink Kathryn A. Sikkink (born 1955) is an American author, human rights academic, and scholar of international relations working primarily through the theoretical strain of constructivism. She is currently a professor at Harvard Kennedy School. Aca ...
, and
Alexander Wendt Alexander Wendt (born 12 June 1958) is an American political scientist and a founding figure of social constructivism in the field of international relations, and a key contributor to quantum social science. Wendt and academics such as Nicholas ...
.


Critical theory (post-structuralism)

Post-structuralism theories of international relations (also called ''critical theories'' due to being inherently critical of traditional IR frameworks) developed in the 1980s from postmodernist studies in political science. Post-structuralism explores the deconstruction of concepts traditionally not problematic in IR (such as "power" and "agency") and examines how the construction of these concepts shapes international relations. The examination of "narratives" plays an important part in poststructuralist analysis; for example, feminist poststructuralist work has examined the role that "women" play in global society and how they are constructed in war as "innocent" and "civilians". Rosenberg's article "Why is there no International Historical Sociology" was a key text in the evolution of this strand of international relations theory. Post-structuralism has garnered both significant praise and criticism, with its critics arguing that post-structuralist research often fails to address the real-world problems that international relations studies is supposed to contribute to solving. Constructivist theory (see above) is the most prominent strand of post-structuralism. Other prominent post-structuralist theories are Marxism, dependency theory, feminism, and the theories of the English school. See also ''
Critical international relations theory Critical international relations theory is a diverse set of schools of thought in international relations (IR) that have criticized the theoretical, meta-theoretical and/or political status quo, both in IR theory and in international politics mor ...
.''


Marxism

Marxist Marxism is a political philosophy and method of socioeconomic analysis. It uses a dialectical and materialist interpretation of historical development, better known as historical materialism, to analyse class relations, social conflic ...
theories of IR reject the realist/liberal view of state conflict or cooperation; instead focusing on the economic and material aspects. It makes the assumption that the economy trumps other concerns, making
economic class A social class or social stratum is a grouping of people into a set of hierarchical social categories, the most common being the working class and the capitalist class. Membership of a social class can for example be dependent on education, wea ...
the fundamental level of analysis. Marxists view the international system as an integrated capitalist system in pursuit of
capital accumulation Capital accumulation is the dynamic that motivates the pursuit of profit, involving the investment of money or any financial asset with the goal of increasing the initial monetary value of said asset as a financial return whether in the form ...
. Thus,
colonialism Colonialism is the control of another territory, natural resources and people by a foreign group. Colonizers control the political and tribal power of the colonised territory. While frequently an Imperialism, imperialist project, colonialism c ...
brought in sources for raw materials and
captive market A captive market is a market where the potential consumers face a severely limited number of competitive suppliers; their only choices are to purchase what is available or to make no purchase at all. The term therefore applies to any market wher ...
s for exports, while decolonialization brought new opportunities in the form of dependence. A prominent derivative of Marxian thought is
critical international relations theory Critical international relations theory is a diverse set of schools of thought in international relations (IR) that have criticized the theoretical, meta-theoretical and/or political status quo, both in IR theory and in international politics mor ...
which is the application of "
critical theory Critical theory is a social, historical, and political school of thought and philosophical perspective which centers on analyzing and challenging systemic power relations in society, arguing that knowledge, truth, and social structures are ...
" to international relations. Early critical theorists were associated with the
Frankfurt School The Frankfurt School is a school of thought in sociology and critical theory. It is associated with the University of Frankfurt Institute for Social Research, Institute for Social Research founded in 1923 at the University of Frankfurt am Main ...
, which followed Marx's concern with the conditions that allow for social change and the establishment of rational institutions. Their emphasis on the "critical" component of theory was derived significantly from their attempt to overcome the limits of positivism. Modern-day proponents such as
Andrew Linklater Andrew Linklater FAcSS (3 August 1949 – 5 March 2023) was a British international relations academic, and Woodrow Wilson Professor of International Politics at Aberystwyth University. In 2000, he was featured as one of the fifty thinkers in M ...
, Robert W. Cox, and Ken Booth focus on the need for human
emancipation Emancipation generally means to free a person from a previous restraint or legal disability. More broadly, it is also used for efforts to procure Economic, social and cultural rights, economic and social rights, civil and political rights, po ...
from the nation-state. Hence, it is "critical" of mainstream IR theories that tend to be both positivist and state-centric.


=Dependency theory

= Further linked in with Marxist theories is
dependency theory Dependency theory is the idea that resources flow from a " periphery" of poor and exploited states to a " core" of wealthy states, enriching the latter at the expense of the former. A central contention of dependency theory is that poor states ...
and the core–periphery model, which argue that developed countries, in their pursuit of power, appropriate developing states through international banking, security and trade agreements and unions on a formal level, and do so through the interaction of political and financial advisors, missionaries, relief aid workers, and MNCs on the informal level, in order to integrate them into the capitalist system, strategically appropriating undervalued natural resources and labor hours and fostering economic and political dependence.


Feminism

Feminist IR considers the ways that international politics affects and is affected by both men and women and also at how the core concepts that are employed within the discipline of IR (e.g. war, security, etc.) are themselves gendered. Feminist IR has not only concerned itself with the traditional focus of IR on states, wars, diplomacy and security, but feminist IR scholars have also emphasized the importance of looking at how gender shapes the current global political economy. In this sense, there is no clear cut division between feminists working in IR and those working in the area of International Political Economy (IPE). From its inception, feminist IR has also theorized extensively about men and, in particular, masculinities. Many IR feminists argue that the discipline is inherently masculine in nature. For example, in her article "Sex and Death in the Rational World of Defense Intellectuals" (1988), Carol Cohn claimed that a highly masculinized culture within the defense establishment contributed to the divorcing of war from human emotion. Alternatively,
Stanley Kubrick Stanley Kubrick (; July 26, 1928 – March 7, 1999) was an American filmmaker and photographer. Widely considered one of the greatest filmmakers of all time, Stanley Kubrick filmography, his films were nearly all adaptations of novels or sho ...
claimed that a masculinized culture characterizes only great powers while small states express rather feminized culture within their defense establishment: "The great nations have always acted like gangsters, and the small nations like prostitutes." Feminist IR emerged largely from the late 1980s onward. The end of the Cold War and the re-evaluation of traditional IR theory during the 1990s opened up a space for gendering International Relations. Because feminist IR is linked broadly to the critical project in IR, by and large most feminist scholarship have sought to problematize the politics of knowledge construction within the discipline—often by adopting methodologies of deconstructivism associated with postmodernism/poststructuralism. However, the growing influence of feminist and women-centric approaches within the international policy communities (for example at the World Bank and the United Nations) is more reflective of the liberal feminist emphasis on equality of opportunity for women. Prominent scholars include
Carol Cohn Carol Cohn is the founding director of the Consortium on Gender, Security and Human Rights and a Lecturer of Women's Studies at the University of Massachusetts Boston. Cohn is recognised for addressing issues of gender in global politics, particul ...
,
Cynthia Enloe Cynthia Holden Enloe (born July 16, 1938) is an American political theorist, feminist writer, and professor. She is best known for her work on gender and militarism and for her contributions to the field of feminist international relations. She h ...
,
Sara Ruddick Sara Ruddick (born Sara Elizabeth Loop; February 17, 1935 – March 20, 2011) was a feminist philosopher and the author of ''Maternal Thinking: Toward a Politics of Peace''. Education and career Ruddick earned an A.B. at Vassar College in 19 ...
, and
J. Ann Tickner Judith Ann Tickner (born 1937) is an Anglo-American feminist international relations (IR) theorist. Tickner is a distinguished scholar in residence at the School of International Services, American University, Washington DC. Career Tickner serv ...
.


International society theory (the English school)

International society theory, also called the English school, focuses on the shared norms and values of states and how they regulate international relations. Examples of such norms include diplomacy, order, and
international law International law, also known as public international law and the law of nations, is the set of Rule of law, rules, norms, Customary law, legal customs and standards that State (polity), states and other actors feel an obligation to, and generall ...
. Theorists have focused particularly on humanitarian intervention, and are subdivided between solidarists, who tend to advocate it more, and pluralists, who place greater value in order and sovereignty. Nicholas Wheeler is a prominent solidarist, while
Hedley Bull Hedley Norman Bull (10 June 1932 – 18 May 1985) was Professor of International Relations at the Australian National University, the London School of Economics and the University of Oxford until his death from cancer in 1985. He was Montague ...
and
Robert H. Jackson Robert Houghwout Jackson (February 13, 1892 – October 9, 1954) was an American lawyer, jurist, and politician who served as an associate justice of the U.S. Supreme Court from 1941 until his death in 1954. He had previously served as Un ...
are perhaps the best known pluralists. Some English school theoreticians have used historical cases in order to show the influence that normative frameworks have on the evolution of the international political order at various critical junctures.


Levels of analysis


Systemic level concepts

International relations are often viewed in terms of ''levels of analysis''. The ''systemic level'' concepts are those broad concepts that define and shape an international milieu, characterized by
anarchy Anarchy is a form of society without rulers. As a type of stateless society, it is commonly contrasted with states, which are centralized polities that claim a monopoly on violence over a permanent territory. Beyond a lack of government, it can ...
. Focusing on the systemic level of international relations is often, but not always, the preferred method for neo-realists and other structuralist IR analysts.


Sovereignty

Preceding the concepts of interdependence and dependence, international relations relies on the idea of sovereignty. Described in
Jean Bodin Jean Bodin (; ; – 1596) was a French jurist and political philosopher, member of the Parlement of Paris and professor of law in Toulouse. Bodin lived during the aftermath of the Protestant Reformation and wrote against the background of reli ...
's ''Six Books of the Commonwealth'' in 1576, the three pivotal points derived from the book describe sovereignty as being a state, that the sovereign power(s) have absolute power over their territories, and that such a power is only limited by the sovereign's "own obligations towards other sovereigns and individuals". Such a foundation of sovereignty is indicated by a sovereign's obligation to other sovereigns, interdependence and dependence to take place. While throughout world history there have been instances of groups lacking or losing sovereignty, such as African nations prior to decolonization or the occupation of Iraq during the
Iraq War The Iraq War (), also referred to as the Second Gulf War, was a prolonged conflict in Iraq lasting from 2003 to 2011. It began with 2003 invasion of Iraq, the invasion by a Multi-National Force – Iraq, United States-led coalition, which ...
, there is still a need for sovereignty in terms of assessing international relations.


Power

The concept of power in international relations can be described as the degree of resources, capabilities, and influence in international affairs. It is often divided up into the concepts of
hard power In politics, hard power is the use of military and economics, economic means to social influence, influence the behavior or interests of other political bodies. This form of political power is often aggressive (coercion), and is most immediately ...
and
soft power In politics (and particularly in international politics), soft power is the ability to co-option, co-opt rather than coerce (in contrast with hard power). It involves shaping the preferences of others through appeal and attraction. Soft power is ...
, hard power relating primarily to coercive power, such as the use of force, and soft power commonly covering
economics Economics () is a behavioral science that studies the Production (economics), production, distribution (economics), distribution, and Consumption (economics), consumption of goods and services. Economics focuses on the behaviour and interac ...
,
diplomacy Diplomacy is the communication by representatives of State (polity), state, International organization, intergovernmental, or Non-governmental organization, non-governmental institutions intended to influence events in the international syste ...
, and
cultural Culture ( ) is a concept that encompasses the social behavior, institutions, and Social norm, norms found in human societies, as well as the knowledge, beliefs, arts, laws, Social norm, customs, capabilities, Attitude (psychology), attitudes ...
influence. However, there is no clear dividing line between the two forms of power.


National interest

Perhaps the most significant concept behind that of power and sovereignty,
national interest The national interest is a sovereign state's goals and ambitions – be they economic, military, cultural, or otherwise – taken to be the aim of its government. Etymology The Italian phrase ''ragione degli stati'' was first used by Giovanni de ...
is a state's action in relation to other states where it seeks to gain advantage or benefits to itself. National interest, whether aspirational or operational, is divided by core/vital and peripheral/non-vital interests. Core or vital interests constitute the things which a country is willing to defend or expand with conflict such as territory, ideology (religious, political, economic), or its citizens. Peripheral or non-vital are interests which a state is willing to compromise. For example, in Germany's annexation of the
Sudetenland The Sudetenland ( , ; Czech and ) is a German name for the northern, southern, and western areas of former Czechoslovakia which were inhabited primarily by Sudeten Germans. These German speakers had predominated in the border districts of Bohe ...
in 1938 (a part of Czechoslovakia) under the
Munich Agreement The Munich Agreement was reached in Munich on 30 September 1938, by Nazi Germany, the United Kingdom, the French Third Republic, French Republic, and the Kingdom of Italy. The agreement provided for the Occupation of Czechoslovakia (1938–194 ...
, Czechoslovakia was willing to relinquish territory which was considered ethnically German in order to preserve its own integrity and sovereignty.


Non-state actors

In the 21st century, the status-quo of the international system is no longer monopolized by states alone. Rather, it is the presence of non-state actors, who autonomously act to implement unpredictable behaviour to the international system. Whether it is
transnational corporations A multinational corporation (MNC; also called a multinational enterprise (MNE), transnational enterprise (TNE), transnational corporation (TNC), international corporation, or stateless corporation, is a corporate organization that owns and cont ...
,
liberation movements A liberation movement is an organization or political movement leading a rebellion, or a non-violent social movement, against a colonial power or national government, often seeking independence based on a nationalist identity and an anti-imperiali ...
,
non-governmental agencies A non-governmental organization (NGO) is an independent, typically nonprofit organization that operates outside government control, though it may get a significant percentage of its funding from government or corporate sources. NGOs often focus ...
, or
international organizations An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own leg ...
, these entities have the potential to significantly influence the outcome of any international transaction. Additionally, this also includes the individual person as while the individual is what constitutes the states collective entity, the individual does have the potential to also create unpredicted behaviours.
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 ...
, as an example of a non-state actor, has significantly influenced the way states (and non-state actors) conduct international affairs.


Power blocs

The existence of power blocs in international relations is a significant factor related to
polarity Polarity may refer to: Science *Electrical polarity, direction of electrical current *Polarity (mutual inductance), the relationship between components such as transformer windings *Polarity (projective geometry), in mathematics, a duality of orde ...
. During 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 alignment of several nations to one side or another based on ideological differences or national interests has become an endemic feature of international relations. Unlike prior, shorter-term blocs, the Western and
Eastern Bloc The Eastern Bloc, also known as the Communist Bloc (Combloc), the Socialist Bloc, the Workers Bloc, and the Soviet Bloc, was an unofficial coalition of communist states of Central and Eastern Europe, Asia, Africa, and Latin America that were a ...
s sought to spread their national ideological differences to other nations. Leaders like US President
Harry S. Truman Harry S. Truman (May 8, 1884December 26, 1972) was the 33rd president of the United States, serving from 1945 to 1953. As the 34th vice president in 1945, he assumed the presidency upon the death of Franklin D. Roosevelt that year. Subsequen ...
under the
Truman Doctrine The Truman Doctrine is a Foreign policy of the United States, U.S. foreign policy that pledges American support for democratic nations against Authoritarianism, authoritarian threats. The doctrine originated with the primary goal of countering ...
believed it was necessary to spread democracy whereas the
Warsaw Pact The Warsaw Pact (WP), formally the Treaty of Friendship, Co-operation and Mutual Assistance (TFCMA), was a Collective security#Collective defense, collective defense treaty signed in Warsaw, Polish People's Republic, Poland, between the Sovi ...
under Soviet policy sought to spread
communism Communism () is a political sociology, sociopolitical, political philosophy, philosophical, and economic ideology, economic ideology within the history of socialism, socialist movement, whose goal is the creation of a communist society, a ...
. After the Cold War, and the dissolution of the ideologically homogeneous Eastern Bloc still gave rise to others such as the South-South Cooperation movement.


Polarity

Polarity in international relations refers to the arrangement of power within the international system. The concept arose from bipolarity during 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 ...
, with the international system dominated by the conflict between two
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, and has been applied retrospectively by theorists. However, the term bipolar was notably used by Stalin who said he saw the international system as a bipolar one with two opposing power bases and ideologies. Consequently, the international system prior to 1945 can be described as multipolar, with power being shared among
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 ...
s. 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 ...
in 1991 had led to unipolarity, with the United States as a sole superpower, although many refuse to acknowledge the fact.
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 ...
's continued rapid economic growth—it became the world's second-largest economy in 2010—respectable international position, and the power the Chinese government exerts over its people (consisting of the second largest population in the world), resulted in debate over whether China is now a superpower or a possible candidate in the future. However, China's strategic force unable of projecting power beyond its region and its nuclear arsenal of 250 warheads (compared to 7,315+ of the United States) mean that the unipolarity will persist in the policy-relevant future. Several theories of international relations draw upon the idea of
polarity Polarity may refer to: Science *Electrical polarity, direction of electrical current *Polarity (mutual inductance), the relationship between components such as transformer windings *Polarity (projective geometry), in mathematics, a duality of orde ...
. The balance of power was a concept prevalent in Europe prior to the
First World War 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 ...
, the thought being that by balancing power blocs it would create stability and prevent war. Theories of the balance of power gained prominence again during 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 ...
, being a central mechanism of
Kenneth Waltz Kenneth Neal Waltz (; June 8, 1924 – May 12, 2013) was an American political scientist who was a member of the faculty at both the University of California, Berkeley, and Columbia University and one of the most prominent scholars in the field ...
's neorealism. Here, the concepts of balancing (rising in power to counter another) and
bandwagoning Bandwagoning in international relations occurs when a state aligns with a stronger, adversarial power and concedes that the stronger adversary-turned-partner disproportionately gains in the spoils they conquer together. Bandwagoning, therefore, i ...
(siding with another) are developed.
Robert Gilpin Robert Gilpin (; July 2, 1930 – June 20, 2018) was an American political scientist. He was Professor of Politics and International Affairs at the Woodrow Wilson School of Public and International Affairs at Princeton University where he held ...
's
hegemonic stability theory Hegemonic stability theory (HST) is a theory of international relations, rooted in research from the fields of political science, economics, and history. HST indicates that the international system is more likely to remain stable when a single sta ...
also draws upon the idea of polarity, specifically the state of unipolarity.
Hegemony Hegemony (, , ) is the political, economic, and military predominance of one State (polity), state over other states, either regional or global. In Ancient Greece (ca. 8th BC – AD 6th c.), hegemony denoted the politico-military dominance of ...
is the preponderance of power at one pole in the international system, and the theory argues this is a stable configuration because of mutual gains by both the dominant power and others in the international system. This is contrary to many neorealist arguments, particularly made by Waltz, stating that the end of the Cold War and the state of unipolarity is an unstable configuration that will inevitably change. The case of Gilpin proved to be correct and Waltz's article titled "The Stability of a Bipolar World" was followed in 1999 by
William Wohlforth William Curti Wohlforth (born 1959) is an American political scientist. He is the Daniel Webster Professor of Government in the Dartmouth College Department of Government, of which he was chair for three academic years (2006-2009). Wohlforth was E ...
's article titled "The Stability of a Unipolar World". Waltz's thesis can be expressed in
power transition theory Power transition theory is a theory about the nature of war, in relation to the power in international relations. The theory was first published in 1958 by its creator, A.F.K. Organski, in his textbook, ''World Politics'' (1958). Theory Organski ...
, which states that it is likely that 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 ...
would challenge a hegemon after a certain period, resulting in a major war. It suggests that while hegemony can control the occurrence of wars, it also results in the creation of one. Its main proponent, A. F. K. Organski, argued this based on the occurrence of previous wars during British, Portuguese, and Dutch hegemony.


Interdependence

Many advocate that the current international system is characterized by growing interdependence; the mutual responsibility and dependency on others. Advocates of this point to growing
globalization Globalization is the process of increasing interdependence and integration among the economies, markets, societies, and cultures of different countries worldwide. This is made possible by the reduction of barriers to international trade, th ...
, particularly with international economic interaction. The role of international institutions, and widespread acceptance of a number of operating principles in the international system, reinforces ideas that relations are characterized by interdependence.


Dependency

Dependency theory Dependency theory is the idea that resources flow from a " periphery" of poor and exploited states to a " core" of wealthy states, enriching the latter at the expense of the former. A central contention of dependency theory is that poor states ...
is a theory most commonly associated with
Marxism Marxism is a political philosophy and method of socioeconomic analysis. It uses a dialectical and materialist interpretation of historical development, better known as historical materialism, to analyse class relations, social conflict, ...
, stating that a set of core states exploit a set of weaker periphery states for their prosperity. Various versions of the theory suggest that this is either an inevitability (standard dependency theory), or use the theory to highlight the necessity for change (Neo-Marxist).


Systemic tools of international relations

*
Diplomacy Diplomacy is the communication by representatives of State (polity), state, International organization, intergovernmental, or Non-governmental organization, non-governmental institutions intended to influence events in the international syste ...
is the practice of communication and negotiation between representatives of states. To some extent, all other tools of international relations can be considered the failure of diplomacy. Keeping in mind, the use of other tools are part of the communication and negotiation inherent within diplomacy. Sanctions, force, and adjusting trade regulations, while not typically considered part of diplomacy, are actually valuable tools in the interest of leverage and placement in negotiations. * Sanctions are usually a first resort after the failure of diplomacy, and are one of the main tools used to enforce treaties. They can take the form of diplomatic or economic sanctions and involve the cutting of ties and imposition of barriers to communication or trade. *
War War is an armed conflict between the armed forces of states, or between governmental forces and armed groups that are organized under a certain command structure and have the capacity to sustain military operations, or between such organi ...
, the use of force, is often thought of as the ultimate tool of international relations. A popular definition is that given by
Carl von Clausewitz Carl Philipp Gottlieb von Clausewitz ( , ; born Carl Philipp Gottlieb Clauswitz; 1 July 1780 – 16 November 1831) was a Kingdom of Prussia, Prussian general and Military theory, military theorist who stressed the "moral" (in modern terms meani ...
, with war being "the continuation of politics by other means". There is a growing study into "new wars" involving actors other than states. The study of war in international relations is covered by the disciplines of "
war studies War studies, sometimes called polemology, is the multi-disciplinary study of war. It pertains to the military A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfa ...
" and "
strategic studies Strategic studies is an interdisciplinary academic field centered on the study of peace and conflict strategies, often devoting special attention to the relationship between military history, international politics, geostrategy, international ...
". * The mobilization of international shame can also be thought of as a tool of international relations. This is attempting to alter states' actions through '
naming and shaming To name and shame is to "publicly say that a person, group or business has done something wrong". It is a form of public shaming used to rally popular opinion against and, in turn, discourage certain kinds of behavior or enterprises. The practic ...
' at the international level. This is mostly done by the large human rights NGOs such as
Amnesty International Amnesty International (also referred to as Amnesty or AI) is an international non-governmental organization focused on human rights, with its headquarters in the United Kingdom. The organization says that it has more than ten million members a ...
(for instance when it called Guantanamo Bay a "Gulag"), or
Human Rights Watch Human Rights Watch (HRW) is an international non-governmental organization that conducts research and advocacy on human rights. Headquartered in New York City, the group investigates and reports on issues including War crime, war crimes, crim ...
. A prominent use of was the
UN Commission on Human Rights The United Nations Commission on Human Rights (UNCHR) was a functional commission within the overall framework of the United Nations from 1946 until it was replaced by the United Nations Human Rights Council in 2006. It was a subsidiary body of th ...
1235 procedure, which publicly exposes state's human rights violations. The current
UN Human Rights Council The United Nations Human Rights Council (UNHRC) is a United Nations body whose mission is to promote and protect human rights around the world. The Council has 47 members elected for staggered three-year terms on a regional group basis. The ...
has yet to use this mechanism. * The allotment of economic and/or diplomatic benefits such as the
European Union The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...
's enlargement policy; candidate countries are only allowed to join if they meet the
Copenhagen criteria The Copenhagen criteria are the rules that define whether a country is eligible to join the European Union. The criteria require that a state has the institutions to preserve democratic governance and human rights, has a functioning mark ...
. * The mutual exchange of ideas, information, art, music, and language among nations through
cultural diplomacy Cultural diplomacy is a type of soft power that includes the "exchange of ideas, information, art, language and other aspects of culture among nations and their peoples in order to foster mutual understanding". The purpose of cultural diplomac ...
has also been recognized by governments as an important tool in the development of international relations.


Unit-level concepts in international relations

As a level of analysis the unit level is often referred to as the state level, as it locates its explanation at the level of the state, rather than the international system.


Regime type

It is often considered that a state's form of government can dictate the way that a state interacts with others in the international relation.
Democratic peace theory Proponents of democratic peace theory argue that both electoral and republican forms of democracy are hesitant to engage in armed conflict with other identified democracies. Different advocates of this theory suggest that several factors ar ...
is a theory that suggests that the nature of
democracy Democracy (from , ''dēmos'' 'people' and ''kratos'' 'rule') is a form of government in which political power is vested in the people or the population of a state. Under a minimalist definition of democracy, rulers are elected through competitiv ...
means that democratic countries will not go to war with each other. The justifications for this are that democracies externalize their norms and only go to war for just causes, and that democracy encourages mutual trust and respect. Communism justifies a
world revolution World revolution is the Marxist concept of overthrowing capitalism in all countries through the conscious revolutionary action of the organized working class. For theorists, these revolutions will not necessarily occur simultaneously, but whe ...
, which similarly would lead to peaceful coexistence, based on a proletarian global society.


Revisionism versus status quo

States can be classified by whether they accept the international
status quo is a Latin phrase meaning the existing state of affairs, particularly with regard to social, economic, legal, environmental, political, religious, scientific or military issues. In the sociological sense, the ''status quo'' refers to the curren ...
, or are revisionist—i.e., want change. Revisionist states seek to fundamentally change the rules and practices of international relations, feeling disadvantaged by the status quo. They see the international system as a largely western creation which serves to reinforce current realities.
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 ...
is an example of a state that has gone from being a revisionist state to one that is satisfied with the status quo, because the status quo is now beneficial to it.


Religion

Religion can have an effect on the way a state acts within the international system, and different theoretical perspectives treat it in somewhat different fashion. One dramatic example is the
Thirty Years' War The Thirty Years' War, fought primarily in Central Europe between 1618 and 1648, was one of the most destructive conflicts in History of Europe, European history. An estimated 4.5 to 8 million soldiers and civilians died from battle, famine ...
(1618–1648) that ravaged much of Europe, which was at least partly motivated by theological differences within Christianity. Religion is a major organizing principle particularly for
Islamic state The Islamic State (IS), also known as the Islamic State of Iraq and the Levant (ISIL), the Islamic State of Iraq and Syria (ISIS) and Daesh, is a transnational Salafi jihadism, Salafi jihadist organization and unrecognized quasi-state. IS ...
s, whereas secularism sits at the other end of the spectrum, with the separation of state and religion being responsible for the
liberal international relations theory Liberalism is a school of thought within international relations theory which revolves around three interrelated principles: * Rejection of power politics as the only possible outcome of international relations; it questions security/warfare pr ...
. 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 ...
in the United States, the role of
Islam Islam is an Abrahamic religions, Abrahamic monotheistic religion based on the Quran, and the teachings of Muhammad. Adherents of Islam are called Muslims, who are estimated to number Islam by country, 2 billion worldwide and are the world ...
in
terrorism Terrorism, in its broadest sense, is the use of violence against non-combatants to achieve political or ideological aims. The term is used in this regard primarily to refer to intentional violence during peacetime or in the context of war aga ...
, and religious strife in the
Middle East The Middle East (term originally coined in English language) is a geopolitical region encompassing the Arabian Peninsula, the Levant, Turkey, Egypt, Iran, and Iraq. The term came into widespread usage by the United Kingdom and western Eur ...
have made the role of religion in international relations a major topic. China's reemergence as a major international power is believed by some scholars to be shaped by
Confucianism Confucianism, also known as Ruism or Ru classicism, is a system of thought and behavior originating in ancient China, and is variously described as a tradition, philosophy, Religious Confucianism, religion, theory of government, or way of li ...
.


Individual or sub-unit level concepts

The level beneath that of the unit (state) can be useful both for explaining factors in international relations that other theories fail to explain, and for moving away from a state-centric view of international relations. * Psychological factors in international relationsUnderstanding a state is not a "black box" as proposed by
realism Realism, Realistic, or Realists may refer to: In the arts *Realism (arts), the general attempt to depict subjects truthfully in different forms of the arts Arts movements related to realism include: *American Realism *Classical Realism *Liter ...
, and that there may be other influences on foreign policy decisions. Examining the role of personalities in the decision-making process can have some
explanatory power Explanatory power is the ability of a hypothesis or theory to explain the subject matter effectively to which it pertains. Its opposite is ''explanatory impotence''. In the past, various criteria or measures for explanatory power have been prop ...
, as can the role of misperception between various actors. A prominent application of sub-unit level psychological factors in international relations is the concept of
Groupthink Groupthink is a psychological phenomenon that occurs within a group of people in which the desire for harmony or conformity in the group results in an irrational or dysfunctional decision-making outcome. Cohesiveness, or the desire for cohesivenes ...
, another is the propensity of policymakers to think in terms of analogies. * Bureaucratic politicsLooks at the role of the
bureaucracy Bureaucracy ( ) is a system of organization where laws or regulatory authority are implemented by civil servants or non-elected officials (most of the time). Historically, a bureaucracy was a government administration managed by departments ...
in decision-making, and sees decisions as a result of bureaucratic infighting, and as having been shaped by various constraints. * Religious, ethnic, and secessionist groupsViewing these aspects of the sub-unit level has explanatory power with regards to
ethnic conflict An ethnic conflict is a conflict between two or more ethnic groups. While the source of the conflict may be political, social, economic or religious, the individuals in conflict must expressly fight for their ethnic group's position within so ...
s,
religious wars A religious war or a war of religion, sometimes also known as a holy war (), is a War, war and conflict which is primarily caused or justified by differences in religion and beliefs. In the modern period, there are frequent debates over the exte ...
, transnational
diaspora A diaspora ( ) is a population that is scattered across regions which are separate from its geographic place of birth, place of origin. The word is used in reference to people who identify with a specific geographic location, but currently resi ...
(
diaspora politics Diaspora politics is the political behavior of transnational ethnic diasporas, their relationship with their ethnic homelands and their host states, and their prominent role in ethnic conflicts. Shain, Yossi & Tamara Cofman Wittes. Peace as a ...
) and other actors which do not consider themselves to fit with the defined state boundaries. This is particularly useful in the context of the pre-modern world of weak states. * Science, technology and international relationsHow science and technology impact global health, business, environment, technology, and development. *
International political economy International political economy (IPE) is the study of how politics shapes the global economy and how the global economy shapes politics. A key focus in IPE is on the power of different actors such as nation states, international organizations and ...
, and economic factors in international relations * International political
culturology Culturology or the science of culture is a branch of the social sciences concerned with the scientific understanding, description, analysis, and prediction of cultures as a whole. While ethnology and anthropology studied different cultural practice ...
Looks at how culture and cultural variables impact in international relations * Personal relations between leaders


Area studies

Area studies are the divisional parts of international studies in which various geopolitical regions are studied in detail. Many university departments are offering area studies in diverse titles.


Major fields of area studies

*
Middle Eastern studies Middle Eastern studies, sometimes referred to as Near Eastern studies, West Asian Studies or South Western Asian studies, is a name given to a number of academic programs associated with the study of the history, culture, politics, economies, an ...
(Also variably known as Near Eastern studies, West Asian studies, and Arab studies) *
Central Asian studies Central Asian studies is the discipline of studying the culture, history, and languages of the region of Central Asia. The roots of Central Asian studies as a social science discipline goes to 19th century Anglo-Russian Great Game. During the 19th ...
*
African studies African studies is the study of Africa, especially the continent's cultures and societies (as opposed to its geology, geography, zoology, etc.). The field includes the study of Africa's History of Africa, history (pre-colonial, Colonisation of Af ...
*
South Asian studies Indology, also known as South Asian studies, is the academic study of the History of India, history and Culture of India, cultures, Languages of South Asia, languages, and Indian literature, literature of the Indian subcontinent, and as such is a ...
*
American studies American studies or American civilization is an interdisciplinarity, interdisciplinary field of scholarship that examines American literature, History of the United States, history, Society of the United States, society, and Culture of the Unit ...
*
European studies European studies is a field of study offered by many academic colleges and universities that focuses on the History of Western civilization and the evolution of Western culture, as well as on current developments in European integration. Some ...
*
Southeast Asian studies Southeast Asian studies (SEAS) refers to research and education on the language, culture, and history of the different states and ethnic groups of Southeast Asia. Some institutions refer to this discipline as ASEAN Studies since most of the countri ...
* Indo-Pacific studies * Australian studies *
Armenian studies Armenian studies or Armenology (, ) is a field of humanities covering Armenian history, language and culture. The emergence of modern Armenian studies is associated with the foundation of the Catholic Mechitarist order in the early 18th century. ...
*
Russian studies Russian studies is an interdisciplinary field crossing politics of Russia, politics, history of Russia, history, Culture of Russia, culture, economy of Russia, economics, and languages of Russia, languages of Russia and its neighborhood, often gr ...
*
Latin American studies Latin American studies (LAS) is an academic and research field associated with the study of Latin America. The interdisciplinary study is a subfield of area studies, and can be composed of numerous disciplines such as economics, sociology, histor ...


Institutions in international relations

International institutions An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own leg ...
form a vital part of contemporary international relations.


Generalist inter-state organizations


United Nations

The
United Nations The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...
(UN) is an
international organization An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own le ...
that describes itself as a "global association of
governments A government is the system or group of people governing an organized community, generally a state. In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government is a m ...
facilitating co-operation in
international law International law, also known as public international law and the law of nations, is the set of Rule of law, rules, norms, Customary law, legal customs and standards that State (polity), states and other actors feel an obligation to, and generall ...
,
international security ''International Security'' is a peer-reviewed academic journal in the field of international and national security. It was founded in 1976 and is edited by the Belfer Center for Science and International Affairs at Harvard University and publis ...
,
economic development In economics, economic development (or economic and social development) is the process by which the economic well-being and quality of life of a nation, region, local community, or an individual are improved according to targeted goals and object ...
, and social equity"; It is the most prominent international institution. Many of the legal institutions follow the same organizational structure as the UN.


Organisation of Islamic Cooperation

The
Organisation of Islamic Cooperation The Organisation of Islamic Cooperation (OIC; ; ), formerly the Organisation of the Islamic Conference, is an intergovernmental organisation founded in 1969. It consists of Member states of the Organisation of Islamic Cooperation, 57 member s ...
(OIC) is an
international organization An international organization, also known as an intergovernmental organization or an international institution, is an organization that is established by a treaty or other type of instrument governed by international law and possesses its own le ...
consisting of 57 member states. The organisation attempts to be the collective voice of the
Muslim world The terms Islamic world and Muslim world commonly refer to the Islamic community, which is also known as the Ummah. This consists of all those who adhere to the religious beliefs, politics, and laws of Islam or to societies in which Islam is ...
(Ummah) and attempts to safeguard the interests and ensure the progress and well-being of
Muslims Muslims () are people who adhere to Islam, a Monotheism, monotheistic religion belonging to the Abrahamic religions, Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God ...
.


Other

Other generalist inter-state organizations include:


Regional security arrangements


Economic institutions


International legal bodies


Human rights


Legal


See also

*
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 ...
, 1947 to 1991 *
Comparative politics Comparative politics is a field in political science characterized either by the use of the '' comparative method'' or other empirical methods to explore politics both within and between countries. Substantively, this can include questions relat ...
* Diplomatic history **
Diplomatic history of World War I The diplomatic history of World War I covers the non-military interactions among the major players during World War I. For the domestic histories of participants see home front during World War I. For a longer-term perspective see international re ...
**
Diplomatic history of World War II The diplomatic history of World War II includes the major foreign policies and interactions inside the opposing coalitions, the Allies of World War II and the Axis powers, between 1939 and 1945. High-level diplomacy began as soon as the war start ...
* The European Institute for International Law and International Relations *
Extraterritoriality In international law, extraterritoriality or exterritoriality is the state of being exempted from the jurisdiction of local law, usually as the result of diplomatic negotiations. Historically, this primarily applied to individuals, as jurisdict ...
*
Geopolitics Geopolitics () is the study of the effects of Earth's geography on politics and international relations. Geopolitics usually refers to countries and relations between them, it may also focus on two other kinds of State (polity), states: ''de fac ...
*
International community The international community is a term used in geopolitics and international relations to refer to a broad group of people and governments of the world. Usage Aside from its use as a general descriptor, the term is typically used to imply the ...
*
International order In international relations, international order refers to patterned or structured relationships between actors on the international level. Definition David Lake, Lisa Martin and Thomas Risse define "order" as "patterned or structured relat ...
*
List of international relations institutes and organisations {{main, International relations Associations * Association of Professional Schools of International Affairs (APSIA) *Global Studies Consortium *International Studies Association * The Jadavpur Association of International Relations * Sigma Iota Rh ...
*
List of international relations journals The following list of scholarly journals in international relations contains notable English-language academic journals on international relations. It is not comprehensive, as there are hundreds currently published. Popular magazines or other publi ...
*
Multilateralism In international relations, multilateralism refers to an alliance of multiple countries pursuing a common goal. Multilateralism is based on the principles of inclusivity, equality, and cooperation, and aims to foster a more peaceful, prosperous, an ...
*
Peace and conflict studies Peace and conflict studies is a social science field that identifies and analyzes violence, violent and nonviolence, nonviolent behaviors as well as the structural violence, structural mechanisms attending Conflict (process), conflicts (including ...
* Peace economics *
Political geography Political geography is concerned with the study of both the spatially uneven outcomes of political processes and the ways in which political processes are themselves affected by spatial structures. Conventionally, for the purposes of analysis, ...
* Periods in international relations **
International relations (1648–1814) International relations from 1648 to 1814 covers the major interactions of the nations of Europe, as well as the other continents, with emphasis on diplomacy, warfare, migration, and cultural interactions, from the Peace of Westphalia to the Cong ...
**
International relations (1814–1919) This article covers worldwide diplomacy and, more generally, the international relations of the great powers from 1814 to 1919. This era covers the period from the end of the Napoleonic Wars and the Congress of Vienna (1814–1815), to the end o ...
**
International relations (1919–1939) International relations (1919–1939) covers the main interactions shaping world history in this era, known as the interwar period, with emphasis on diplomacy and economic relations. The coverage here follows the diplomatic history of World War I. ...
**
International relations since 1989 International relations since 1989 covers the main trends in world affairs in the post–Cold War era. Trends The 21st century has been marked by growing economic globalization and integration, with consequent increased risk to interlinked eco ...
*
Responsibility to protect The responsibility to protect (R2P or RtoP) is a global political commitment which was endorsed by the United Nations General Assembly at the 2005 World Summit in order to address its four key concerns to prevent genocide, war crimes, ethnic cle ...
*
Right of conquest The right of conquest was historically a right of ownership to land after immediate possession via force of arms. It was recognized as a principle of international law that gradually deteriorated in significance until its proscription in the af ...
*
Security studies __NOTOC__ Security studies, also known as international security studies, is an academic sub-field within the wider discipline of international relations that studies organized violence, military conflict, national security, and international s ...


References


Bibliography

* * Dyvik, Synne L., Jan Selby and
Rorden Wilkinson Rorden Wilkinson FAcSS FRSA (born 13 February 1970) is a British Australian academic, author, and university leader. He is Deputy Vice-Chancellor (Academic) and Professor of International Political Economy at Macquarie University, Sydney, Austral ...
, eds. ''What's the Point of International Relations'' (2017) * * Reus-Smit, Christian, and Duncan Snidal, eds. ''The Oxford Handbook of International Relations'' (2010)


Theory

*
Norman Angell Sir Ralph Norman Angell (26 December 1872 – 7 October 1967) was an English Nobel Peace Prize winner. He was a lecturer, journalist, author and Member of Parliament for the Labour Party. Angell was one of the principal founders of the Union ...
''The Great Illusion'' (London: Heinemann, 1910) *
Raymond Aron Raymond Claude Ferdinand Aron (; ; 14 March 1905 – 17 October 1983) was a French philosopher, sociologist, political scientist, historian and journalist, one of France's most prominent thinkers of the 20th century. Aron is best known for his ...
''Peace and War'' (English edition 1966) *
Hedley Bull Hedley Norman Bull (10 June 1932 – 18 May 1985) was Professor of International Relations at the Australian National University, the London School of Economics and the University of Oxford until his death from cancer in 1985. He was Montague ...
''The Anarchical Society'' (New York: Columbia University Press, 1977) * Barry Buzan, ''People, States and Fear'' * E. H. Carr '' The Twenty Years' Crisis'' (2001)
939 Year 939 ( CMXXXIX) was a common year starting on Tuesday of the Julian calendar. Events By place Europe * Hugh the Great, count of Paris, rebels against King Louis IV ("d'Outremer") and gains support from William I, duke of Normandy ...
(New York: Perennial) * Robert Cooper ''The Post-Modern State'' * Robert W. Cox, ''Production, Power, and World Order'' (1987) * Enloe, Cynthia. "'Gender' Is Not Enough: The Need for a Feminist Consciousness". ''International Affairs'' 80.1 (2004): 95–97. Web. 17 Sept. 2013. * Robert Gilpin, ''War and Change ín World Politics'' (1981) * Joshua S. Goldstein, ''Long Cycles'' (1988) * Goodin, Robert E., and Hans-Dieter Klingemann, eds. ''A New Handbook of Political Science'' (1998) ch 16–19 pp 401–78 * John H. Herz, ''The Nation-State and the Crisis of World Politics'' (1976) * Charlotte Hooper "Masculinities, IR and the 'Gender Variable': A Cost-Benefit Analysis for (Sympathetic) Gender Sceptics". ''International Studies'' 25.3 (1999): 475–491. * James C. Hsiang ''Anarchy & Order: The Interplay of Politics and Law in International Relations'' 1555875718, 9781555875718 Lynne Rienner Pub 1997 *
Andrew Hurrell Andrew James Hurrell, FBA (born 2 February 1955) is a leading British scholar of international relations. He is currently a senior research fellow at Balliol College, Oxford, having previously been Montague Burton Professor of International Rela ...
''On Global Order: Power, Values, and the Constitution of International Society'' (Oxford University Press, 2008)
On Global Order: Power, Values, and the Constitution of International Society
*
Robert Keohane Robert Owen Keohane (born October 3, 1941) is an American political scientist working in the fields of international relations and international political economy. Following the publication of his influential book '' After Hegemony'' (1984), he h ...
''After Hegemony'' *
Robert Keohane Robert Owen Keohane (born October 3, 1941) is an American political scientist working in the fields of international relations and international political economy. Following the publication of his influential book '' After Hegemony'' (1984), he h ...
, ed., ''Neo-Realism and Its Critics'' (1986) *
Hans Köchler Hans Köchler (born 18 October 1948) is a retired professor of philosophy at the University of Innsbruck, Austria, and president of the International Progress Organization, a non-governmental organization in consultative status with the United N ...
, ''Democracy and the International Rule of Law''. Vienna/New York: Springer, 1995 *
Andrew Linklater Andrew Linklater FAcSS (3 August 1949 – 5 March 2023) was a British international relations academic, and Woodrow Wilson Professor of International Politics at Aberystwyth University. In 2000, he was featured as one of the fifty thinkers in M ...
''Men and citizens in the theory of international relations'' *
Donald Markwell Donald John Markwell (born 19 April 1959) is an Australian social scientist, who has been described as a "renowned Australian educational reformer". He was appointed Head of St Mark's College, Adelaide, from November 2019. He was Senior Advise ...
''
John Maynard Keynes John Maynard Keynes, 1st Baron Keynes ( ; 5 June 1883 – 21 April 1946), was an English economist and philosopher whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments. Originall ...
and International Relations: Economic Paths to War and Peace'' (Oxford: Oxford University Press, 2006). *
John Mearsheimer John Joseph Mearsheimer (; born December 14, 1947) is an American political scientist and international relations scholar. He is R. Wendell Harrison Distinguished Service Professor in the University of Chicago. Mearsheimer is best known for dev ...
''The Tragedy of Great Power Politics'' (2001) * Hans J. Morgenthau ''Scientific Man versus Power Politics, Scientific Man Vs. Power Politics'' (Chicago: University of Chicago Press, 1946) * Reinhold Niebuhr ''Moral Man and Immoral Society'' 1932 *
Joseph Nye Joseph Samuel Nye Jr. (January 19, 1937 – May 6, 2025) was an American political scientist. He and Robert Keohane co-founded the international relations theory of neoliberalism, which they developed in their 1977 book ''Power and Interdepe ...
''Soft Power: The Means to Success in World Politics'', Public Affairs Ltd 2004 * Paul Raskin ''The Great Transition Today: A Report from the Future'' * Benno Teschke ''The Myth of 1648'' (New York: Verso Press, 2003). *
J. Ann Tickner Judith Ann Tickner (born 1937) is an Anglo-American feminist international relations (IR) theorist. Tickner is a distinguished scholar in residence at the School of International Services, American University, Washington DC. Career Tickner serv ...
''Gender in International Relations'' (New York: Columbia University Press, 1992). *
Kenneth Waltz Kenneth Neal Waltz (; June 8, 1924 – May 12, 2013) was an American political scientist who was a member of the faculty at both the University of California, Berkeley, and Columbia University and one of the most prominent scholars in the field ...
''Man, the State, and War'' *
Kenneth Waltz Kenneth Neal Waltz (; June 8, 1924 – May 12, 2013) was an American political scientist who was a member of the faculty at both the University of California, Berkeley, and Columbia University and one of the most prominent scholars in the field ...
''Theory of International Politics'' (1979) * Michael Walzer ''Just and Unjust Wars'' 1977 *
Alexander Wendt Alexander Wendt (born 12 June 1958) is an American political scientist and a founding figure of social constructivism in the field of international relations, and a key contributor to quantum social science. Wendt and academics such as Nicholas ...
''Social Theory of International Politics'' 1999


Textbooks


History of international relations


External links

*
The European Institute for International Law and International Relations
{{DEFAULTSORT:International Relations International relations, Politics