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The law of the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., ...
comprises many levels of codified and uncodified forms of law, of which the most important is the nation's
Constitution A constitution is the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organisation or other type of entity and commonly determine how that entity is to be governed. When these pr ...
, which prescribes the foundation of the federal government of the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country Continental United States, primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., ...
, as well as various civil liberties. The Constitution sets out the boundaries of federal law, which consists of Acts of Congress, treaties ratified by the Senate, regulations promulgated by the executive branch, and case law originating from the
federal judiciary The judiciary (also known as the judicial system, judicature, judicial branch, judiciative branch, and court or judiciary system) is the system of courts that adjudicates legal disputes/disagreements and interprets, defends, and applies the law ...
. The United States Code is the official compilation and codification of general and permanent federal statutory law. Federal law and treaties, so long as they are in accordance with the Constitution, preempt conflicting state and territorial laws in the 50 U.S. states and in the territories. However, the scope of federal preemption is limited because the scope of federal power is not universal. In the dual sovereign system of American federalism (actually tripartite because of the presence of
Indian reservation An Indian reservation is an area of land held and governed by a federally recognized Native American tribal nation whose government is accountable to the United States Bureau of Indian Affairs and not to the state government in which it ...
s), states are the
plenary Plenary is an adjective related to the noun plenum carrying a general connotation of fullness. Plenary may also refer to: *Plenary session or meeting, the part of a conference when all members of all parties are in attendance **Plenary speaker, ...
sovereign ''Sovereign'' is a title which can be applied to the highest leader in various categories. The word is borrowed from Old French , which is ultimately derived from the Latin , meaning 'above'. The roles of a sovereign vary from monarch, ruler or ...
s, each with their own
constitution A constitution is the aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organisation or other type of entity and commonly determine how that entity is to be governed. When these pr ...
, while the federal sovereign possesses only the limited supreme authority enumerated in the Constitution. Indeed, states may grant their citizens broader rights than the federal Constitution as long as they do not infringe on any federal constitutional rights. Thus U.S. law (especially the actual "living law" of
contract A contract is a legally enforceable agreement between two or more parties that creates, defines, and governs mutual rights and obligations between them. A contract typically involves the transfer of goods, services, money, or a promise to tr ...
,
tort A tort is a civil wrong that causes a claimant to suffer loss or harm, resulting in legal liability for the person who commits the tortious act. Tort law can be contrasted with criminal law, which deals with criminal wrongs that are punishable ...
,
property Property is a system of rights that gives people legal control of valuable things, and also refers to the valuable things themselves. Depending on the nature of the property, an owner of property may have the right to consume, alter, share, r ...
, criminal, and family law experienced by the majority of citizens on a day-to-day basis) consists primarily of
state law State law refers to the law of a federated state, as distinguished from the law of the federation A federation (also known as a federal state) is a political entity characterized by a union of partially self-governing provinces, states, o ...
, which can and does vary greatly from one state to the next. At both the federal and state levels, with the exception of the legal system of Louisiana, the law of the United States is largely derived from the
common law In law, common law (also known as judicial precedent, judge-made law, or case law) is the body of law created by judges and similar quasi-judicial tribunals by virtue of being stated in written opinions."The common law is not a brooding omniprese ...
system of English law, which was in force in British America at the time of the
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was a major war of the American Revolution. Widely considered as the war that secured the independence of t ...
. Professor Friedman points out that English law itself was never completely uniform across
England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe ...
prior to the 20th century. The result was that the colonists recreated the legal diversity of English law in the American colonies.
However, American law has diverged greatly from its English ancestor both in terms of substance and procedure and has incorporated a number of civil law innovations.


General overview


Sources of law

In the United States, the law is derived from five sources:
constitutional law Constitutional law is a body of law which defines the role, powers, and structure of different entities within a state, namely, the executive, the parliament or legislature, and the judiciary; as well as the basic rights of citizens and, in fe ...
, statutory law, treaties, administrative regulations, and the common law (which includes case law).


Constitutionality

Where Congress enacts a statute that conflicts with the Constitution, state or federal courts may rule that law to be unconstitutional and declare it invalid. Notably, a statute does not automatically disappear merely because it has been found unconstitutional; it may, however, be deleted by a subsequent statute. Many federal and state statutes have remained on the books for decades after they were ruled to be unconstitutional. However, under the principle of ''
stare decisis A precedent is a principle or rule established in a previous legal case that is either binding on or persuasive for a court or other tribunal when deciding subsequent cases with similar issues or facts. Common-law legal systems place great va ...
'', no sensible lower court will enforce an unconstitutional statute, and any court that does so will be reversed by the Supreme Court. Conversely, any court that refuses to enforce a constitutional statute (where such constitutionality has been expressly established in prior cases) will risk reversal by the Supreme Court.


American common law

The United States and most Commonwealth countries are heirs to the common law legal tradition of English law. Certain practices traditionally allowed under English common law were expressly outlawed by the Constitution, such as bills of attainder and general search warrants. As common law courts, U.S. courts have inherited the principle of ''stare decisis''. American judges, like common law judges elsewhere, not only apply the law, they also make the law, to the extent that their decisions in the cases before them become precedent for decisions in future cases. The actual substance of English law was formally "received" into the United States in several ways. First, all U.S. states except Louisiana have enacted " reception statutes" which generally state that the common law of England (particularly judge-made law) is the law of the state to the extent that it is not repugnant to domestic law or indigenous conditions. Some reception statutes impose a specific cutoff date for reception, such as the date of a colony's founding, while others are deliberately vague.''Ibid.'' Thus, contemporary U.S. courts often cite pre-Revolution cases when discussing the evolution of an ancient judge-made common law principle into its modern form, such as the heightened duty of care traditionally imposed upon
common carrier A common carrier in common law countries (corresponding to a public carrier in some civil law systems,Encyclopædia Britannica CD 2000 "Civil-law public carrier" from "carriage of goods" usually called simply a ''carrier'') is a person or compan ...
s. Second, a small number of important British statutes in effect at the time of the Revolution have been independently reenacted by U.S. states. Two examples are the
Statute of Frauds The Statute of Frauds (29 Car 2 c 3) (1677) was an Act of the Parliament of England. It required that certain types of contracts, wills, and grants, and assignment or surrender of leases or interest in real property must be in writing and si ...
(still widely known in the U.S. by that name) and the Statute of 13 Elizabeth (the ancestor of the Uniform Fraudulent Transfer Act). Such English statutes are still regularly cited in contemporary American cases interpreting their modern American descendants. Despite the presence of reception statutes, much of ''contemporary'' American common law has diverged significantly from English common law. Although the courts of the various Commonwealth nations are often influenced by each other's rulings, American courts rarely follow post-Revolution precedents from England or the British Commonwealth. Early on, American courts, even after the Revolution, often did cite contemporary English cases, because appellate decisions from many American courts were not regularly reported until the mid-19th century. Lawyers and judges used English legal materials to fill the gap. Citations to English decisions gradually disappeared during the 19th century as American courts developed their own principles to resolve the legal problems of the American people. The number of published volumes of American reports soared from eighteen in 1810 to over 8,000 by 1910. By 1879 one of the delegates to the California constitutional convention was already complaining: "Now, when we require them to state the reasons for a decision, we do not mean they shall write a hundred pages of detail. We onot mean that they shall include the small cases, and impose on the country all this fine judicial literature, for the Lord knows we have got enough of that already." Today, in the words of Stanford law professor Lawrence M. Friedman: "American cases rarely cite foreign materials. Courts occasionally cite a British classic or two, a famous old case, or a nod to Blackstone; but current British law almost never gets any mention." Foreign law has never been cited as binding precedent, but as a reflection of the shared values of Anglo-American civilization or even Western civilization in general.


Levels of law


Federal law

Federal law originates with the Constitution, which gives Congress the power to enact
statute A statute is a formal written enactment of a legislative authority that governs the legal entities of a city, state, or country by way of consent. Typically, statutes command or prohibit something, or declare policy. Statutes are rules made by ...
s for certain limited purposes like regulating
interstate commerce The Commerce Clause describes an enumerated power listed in the United States Constitution ( Article I, Section 8, Clause 3). The clause states that the United States Congress shall have power "to regulate Commerce with foreign Nations, and amo ...
. The United States Code is the official compilation and codification of the general and permanent federal statutes. Many statutes give executive branch agencies the power to create
regulation Regulation is the management of complex systems according to a set of rules and trends. In systems theory, these types of rules exist in various fields of biology and society, but the term has slightly different meanings according to context. ...
s, which are published in the Federal Register and codified into the Code of Federal Regulations. Regulations generally also carry the force of law under the ''Chevron'' doctrine. Many lawsuits turn on the meaning of a federal statute or regulation, and judicial interpretations of such meaning carry legal force under the principle of ''
stare decisis A precedent is a principle or rule established in a previous legal case that is either binding on or persuasive for a court or other tribunal when deciding subsequent cases with similar issues or facts. Common-law legal systems place great va ...
''. During the 18th and 19th centuries, federal law traditionally focused on areas where there was an express grant of power to the federal government in the federal Constitution, like the
military A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically authorized and maintained by a sovereign state, with its members identifiable by their distinct ...
,
money Money is any item or verifiable record that is generally accepted as payment for goods and services and repayment of debts, such as taxes, in a particular country or socio-economic context. The primary functions which distinguish money ar ...
, foreign relations (especially international treaties),
tariff A tariff is a tax imposed by the government of a country or by a supranational union on imports or exports of goods. Besides being a source of revenue for the government, import duties can also be a form of regulation of foreign trade and p ...
s,
intellectual property Intellectual property (IP) is a category of property that includes intangible creations of the human intellect. There are many types of intellectual property, and some countries recognize more than others. The best-known types are patents, co ...
(specifically
patent A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention."A ...
s and
copyright A copyright is a type of intellectual property that gives its owner the exclusive right to copy, distribute, adapt, display, and perform a creative work, usually for a limited time. The creative work may be in a literary, artistic, educatio ...
s), and
mail The mail or post is a system for physically transporting postcards, letters, and parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid-19th century, national postal sys ...
. Since the start of the 20th century, broad interpretations of the
Commerce Commerce is the large-scale organized system of activities, functions, procedures and institutions directly and indirectly related to the exchange (buying and selling) of goods and services among two or more parties within local, regional, natio ...
and Spending Clauses of the Constitution have enabled federal law to expand into areas like
aviation Aviation includes the activities surrounding mechanical flight and the aircraft industry. ''Aircraft'' includes airplane, fixed-wing and helicopter, rotary-wing types, morphable wings, wing-less lifting bodies, as well as aerostat, lighter- ...
,
telecommunications Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than that ...
,
railroad Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a prep ...
s,
pharmaceutical A medication (also called medicament, medicine, pharmaceutical drug, medicinal drug or simply drug) is a drug used to diagnose, cure, treat, or prevent disease. Drug therapy ( pharmacotherapy) is an important part of the medical field and ...
s, antitrust, and
trademark A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from ot ...
s. In some areas, like aviation and railroads, the federal government has developed a comprehensive scheme that preempts virtually all state law, while in others, like family law, a relatively small number of federal statutes (generally covering interstate and international situations) interacts with a much larger body of state law. In areas like antitrust, trademark, and employment law, there are powerful laws at both the federal and state levels that coexist with each other. In a handful of areas like
insurance Insurance is a means of protection from financial loss in which, in exchange for a fee, a party agrees to compensate another party in the event of a certain loss, damage, or injury. It is a form of risk management, primarily used to hedge ...
, Congress has enacted laws expressly refusing to regulate them as long as the states have laws regulating them (see, e.g., the McCarran–Ferguson Act).


Statutes

After the president signs a bill into law (or Congress enacts it over the president's veto), it is delivered to the
Office of the Federal Register The Office of the Federal Register is an office of the United States government within the National Archives and Records Administration. The Office publishes the ''Federal Register'', ''Code of Federal Regulations'', ''Public Papers of the Presid ...
(OFR) of the
National Archives and Records Administration The National Archives and Records Administration (NARA) is an " independent federal agency of the United States government within the executive branch", charged with the preservation and documentation of government and historical records. It ...
(NARA) where it is assigned a law number, and prepared for publication as a slip law. Public laws, but not private laws, are also given legal statutory citation by the OFR. At the end of each session of Congress, the slip laws are compiled into bound volumes called the United States Statutes at Large, and they are known as
session law Session laws are the collection of statutes enacted by a legislature during a single session of that legislature, often published following the end of the session as a bound volume. The United States Statutes at Large are an example of session l ...
s. The Statutes at Large present a chronological arrangement of the laws in the exact order that they have been enacted. Public laws are incorporated into the United States Code, which is a codification of all general and permanent laws of the United States. The main edition is published every six years by the Office of the Law Revision Counsel of the House of Representatives, and cumulative supplements are published annually. The U.S. Code is arranged by subject matter, and it shows the present status of laws (with amendments already incorporated in the text) that have been amended on one or more occasions.


Regulations

Congress often enacts statutes that grant broad rulemaking authority to federal agencies. Often, Congress is simply too gridlocked to draft detailed statutes that explain how the agency should react to every possible situation, or Congress believes the agency's technical specialists are best equipped to deal with particular fact situations as they arise. Therefore, federal agencies are authorized to promulgate regulations. Under the principle of ''
Chevron Chevron (often relating to V-shaped patterns) may refer to: Science and technology * Chevron (aerospace), sawtooth patterns on some jet engines * Chevron (anatomy), a bone * '' Eulithis testata'', a moth * Chevron (geology), a fold in rock la ...
'' deference, regulations normally carry the force of law as long as they are based on a reasonable interpretation of the relevant statutes. Regulations are adopted pursuant to the Administrative Procedure Act (APA). Regulations are first proposed and published in the Federal Register (FR or Fed. Reg.) and subject to a public comment period. Eventually, after a period for public comment and revisions based on comments received, a final version is published in the Federal Register. The regulations are codified and incorporated into the Code of Federal Regulations (CFR) which is published once a year on a rolling schedule. Besides regulations formally promulgated under the APA, federal agencies also frequently promulgate an enormous amount of forms, manuals, policy statements, letters, and rulings. These documents may be considered by a court as persuasive authority as to how a particular statute or regulation may be interpreted (known as '' Skidmore'' deference), but are not entitled to ''Chevron'' deference.


Common law, case law, and precedent

Unlike the situation with the states, there is no plenary reception statute at the federal level that continued the common law and thereby granted federal courts the power to formulate legal precedent like their English predecessors. Federal courts are solely creatures of the federal Constitution and the federal Judiciary Acts. However, it is universally accepted that the
Founding Fathers of the United States The Founding Fathers of the United States, known simply as the Founding Fathers or Founders, were a group of late-18th-century American revolutionary leaders who united the Thirteen Colonies, oversaw the war for independence from Great Britai ...
, by vesting "judicial power" into the Supreme Court and the inferior federal courts in Article Three of the United States Constitution, thereby vested in them the implied judicial power of common law courts to formulate
persuasive precedent A precedent is a principle or rule established in a previous legal case that is either binding on or persuasive for a court or other tribunal when deciding subsequent cases with similar issues or facts. Common-law legal systems place great value ...
; this power was widely accepted, understood, and recognized by the Founding Fathers at the time the Constitution was ratified.''Hart v. Massanari'', 266 F.3d 1155 (9th Cir. 2001), citing ''Anastasoff v. United States'', 223 F.3d 898, ''vacated as moot on reh'g en banc'', 235 F.3d 1054 (8th Cir. 2000). Several legal scholars have argued that the federal judicial power to decide " cases or controversies" necessarily includes the power to decide the precedential effect of those cases and controversies. The difficult question is whether federal judicial power extends to formulating binding precedent through strict adherence to the rule of ''stare decisis''. This is where the act of deciding a case becomes a limited form of lawmaking in itself, in that an appellate court's rulings will thereby bind itself and lower courts in future cases (and therefore also implicitly binds all persons within the court's jurisdiction). Prior to a major change to federal court rules in 2007, about one-fifth of federal appellate cases were published and thereby became binding precedents, while the rest were unpublished and bound only the parties to each case. As federal judge Alex Kozinski has pointed out, binding precedent as we know it today simply did not exist at the time the Constitution was framed. Judicial decisions were not consistently, accurately, and faithfully reported on both sides of the Atlantic (reporters often simply rewrote or failed to publish decisions which they disliked), and the United Kingdom lacked a coherent court hierarchy prior to the end of the 19th century. Furthermore, English judges in the eighteenth century subscribed to now-obsolete
natural law Natural law ( la, ius naturale, ''lex naturalis'') is a system of law based on a close observation of human nature, and based on values intrinsic to human nature that can be deduced and applied independently of positive law (the express enacte ...
theories of law, by which law was believed to have an existence independent of what individual judges said. Judges saw themselves as merely declaring the law which had always theoretically existed, and not as making the law. Therefore, a judge could reject another judge's opinion as simply an incorrect statement of the law, in the way that scientists regularly reject each other's conclusions as incorrect statements of the laws of science. In turn, according to Kozinski's analysis, the contemporary rule of binding precedent became possible in the U.S. in the nineteenth century only after the creation of a clear court hierarchy (under the Judiciary Acts), and the beginning of regular ''verbatim'' publication of U.S. appellate decisions by West Publishing. The rule gradually developed, case-by-case, as an extension of the judiciary's
public policy Public policy is an institutionalized proposal or a decided set of elements like laws, regulations, guidelines, and actions to solve or address relevant and real-world problems, guided by a conception and often implemented by programs. Public ...
of effective judicial administration (that is, in order to efficiently exercise the judicial power). The rule of binding precedent is generally justified today as a matter of public policy, first, as a matter of fundamental fairness, and second, because in the absence of case law, it would be completely unworkable for every minor issue in every legal case to be briefed, argued, and decided from first principles (such as relevant statutes, constitutional provisions, and underlying public policies), which in turn would create hopeless inefficiency, instability, and unpredictability, and thereby undermine the rule of law. The contemporary form of the rule is descended from Justice
Louis Brandeis Louis Dembitz Brandeis (; November 13, 1856 – October 5, 1941) was an American lawyer and associate justice on the Supreme Court of the United States from 1916 to 1939. Starting in 1890, he helped develop the " right to privacy" concep ...
's "landmark dissent in 1932’s ''Burnet v. Coronado Oil & Gas Co''.," which "catalogued the Court’s actual overruling practices in such a powerful manner that his attendant stare decisis analysis immediately assumed canonical authority." Available via SpringerLink. Here is a typical exposition of how public policy supports the rule of binding precedent in a 2008 majority opinion signed by
Justice Breyer Stephen Gerald Breyer ( ; born August 15, 1938) is a retired American lawyer and jurist who served as an associate justice of the U.S. Supreme Court from 1994 until his retirement in 2022. He was nominated by President Bill Clinton, and rep ...
:
Justice Brandeis once observed that "in most matters it is more important that the applicable rule of law be settled than that it be settled right." ''Burnet v. Coronado Oil & Gas Co.'' ..To overturn a decision settling one such matter simply because we might believe that decision is no longer "right" would inevitably reflect a willingness to reconsider others. And that willingness could itself threaten to substitute disruption, confusion, and uncertainty for necessary legal stability. We have not found here any factors that might overcome these considerations.
It is now sometimes possible, over time, for a line of precedents to drift from the express language of any underlying statutory or constitutional texts until the courts' decisions establish doctrines that were not considered by the texts' drafters. This trend has been strongly evident in federal substantive due process and Commerce Clause decisions. Originalists and political conservatives, such as Associate Justice
Antonin Scalia Antonin Gregory Scalia (; March 11, 1936 – February 13, 2016) was an American jurist who served as an associate justice of the Supreme Court of the United States from 1986 until his death in 2016. He was described as the intellectu ...
have criticized this trend as anti-democratic. Under the doctrine of ''
Erie Railroad Co. v. Tompkins ''Erie Railroad Co. v. Tompkins'', 304 U.S. 64 (1938), was a landmark U.S. Supreme Court decision in which the Court held that there is no general American federal common law and that U.S. federal courts must apply state law, not federal law, t ...
'' (1938), there is ''no general federal common law''. Although federal courts can create federal common law in the form of case law, such law must be linked one way or another to the interpretation of a particular federal constitutional provision, statute, or regulation (which was either enacted as part of the Constitution or pursuant to constitutional authority). Federal courts lack the plenary power possessed by state courts to simply make up law, which the latter are able to do in the absence of constitutional or statutory provisions replacing the common law. Only in a few narrow limited areas, like maritime law, has the Constitution expressly authorized the continuation of English common law at the federal level (meaning that in those areas federal courts can continue to make law as they see fit, subject to the limitations of ''stare decisis''). The other major implication of the ''Erie'' doctrine is that federal courts cannot dictate the content of state law when there is no federal issue (and thus no federal supremacy issue) in a case. When hearing claims under state law pursuant to diversity jurisdiction, federal trial courts ''must'' apply the statutory and decisional law of the state in which they sit, as if they were a court of that state, even if they believe that the relevant state law is irrational or just bad public policy. Under ''Erie'', such federal deference to state law applies only in one direction: state courts are not bound by federal interpretations of state law. Similarly, state courts are also not bound by most federal interpretations of federal law. In the vast majority of state courts, interpretations of federal law from federal courts of appeals and district courts can be cited as persuasive authority, but state courts are not bound by those interpretations. The U.S. Supreme Court has never squarely addressed the issue, but has signaled in dicta that it sides with this rule. Therefore, in those states, there is only one federal court that binds all state courts as to the interpretation of federal law and the federal Constitution: the U.S. Supreme Court itself.


State and territory law

The fifty American states are separate sovereigns, with their own state constitutions,
state government A state government is the government that controls a subdivision of a country in a federal form of government, which shares political power with the federal or national government. A state government may have some level of political autonom ...
s, and state courts. All states have a legislative branch which enacts state statutes, an executive branch that promulgates state regulations pursuant to statutory authorization, and a judicial branch that applies, interprets, and occasionally overturns both state statutes and regulations, as well as local ordinances. They retain plenary power to make laws covering anything not preempted by the federal Constitution, federal statutes, or international treaties ratified by the federal Senate. Normally, state supreme courts are the final interpreters of state constitutions and state law, unless their interpretation itself presents a federal issue, in which case a decision may be appealed to the U.S. Supreme Court by way of a petition for writ of certiorari. State laws have dramatically diverged in the centuries since independence, to the extent that the United States cannot be regarded as one legal system as to the majority of types of law traditionally under state control, but must be regarded as 50 ''separate'' systems of tort law, family law, property law, contract law, criminal law, and so on. Most cases are litigated in state courts and involve claims and defenses under state laws. In a 2012 report, the National Center for State Courts' Court Statistics Project found that state trial courts received 103.5 million newly filed cases in 2010, which consisted of 56.3 million traffic cases, 20.4 million criminal cases, 19.0 million civil cases, 5.9 million domestic relations cases, and 1.9 million juvenile cases. In 2010, state appellate courts received 272,795 new cases. By way of comparison, all federal district courts in 2016 together received only about 274,552 new civil cases, 79,787 new criminal cases, and 833,515 bankruptcy cases, while federal appellate courts received 53,649 new cases.


State legal systems


Territorial legal systems

*
Law of America Samoa Law is a set of rules that are created and are enforceable by social or governmental institutions to regulate behavior,Robertson, ''Crimes against humanity'', 90. with its precise definition a matter of longstanding debate. It has been vario ...
* Law of Guam * Law of the Northern Mariana Islands *
Law of Puerto Rico The legal system of Puerto Rico is a mix of the civil law and the common law systems. Language Puerto Rico is the only current U.S. jurisdiction whose legal system operates primarily in a language other than American English: namely, Spanish. B ...
* Law of the U.S. Virgin Islands


Local law

States have delegated lawmaking powers to thousands of agencies,
township A township is a kind of human settlement or administrative subdivision, with its meaning varying in different countries. Although the term is occasionally associated with an urban area, that tends to be an exception to the rule. In Australia, ...
s, counties, cities, and special districts. And all the state constitutions, statutes and regulations (as well as all the ordinances and regulations promulgated by local entities) are subject to judicial interpretation like their federal counterparts. It is common for residents of major U.S. metropolitan areas to live under six or more layers of special districts as well as a town or city, and a county or township (in addition to the federal and state governments). Thus, at any given time, the average American citizen is subject to the rules and regulations of several dozen different agencies at the federal, state, and local levels, depending upon one's current location and behavior.


Legal subjects

American lawyers draw a fundamental distinction between procedural law (which controls the procedure by which legal duties and rights are vindicated) and substantive law (the actual substance of law, which is usually expressed in the form of various legal rights and duties).


Criminal law and procedure

Criminal law involves the prosecution by the state of wrongful acts which are considered to be so serious that they are a breach of the sovereign's peace (and cannot be deterred or remedied by mere lawsuits between private parties). Generally,
crime In ordinary language, a crime is an unlawful act punishable by a state or other authority. The term ''crime'' does not, in modern criminal law, have any simple and universally accepted definition,Farmer, Lindsay: "Crime, definitions of", in C ...
s can result in
incarceration Imprisonment is the restraint of a person's liberty, for any cause whatsoever, whether by authority of the government, or by a person acting without such authority. In the latter case it is " false imprisonment". Imprisonment does not necessar ...
, but torts (see below) cannot. The majority of the crimes committed in the United States are prosecuted and punished at the state level. Federal criminal law focuses on areas specifically relevant to the federal government like evading payment of federal income tax, mail theft, or physical attacks on federal officials, as well as interstate crimes like drug trafficking and wire fraud. All states have somewhat similar laws in regard to "higher crimes" (or felonies), such as
murder Murder is the unlawful killing of another human without justification or valid excuse, especially the unlawful killing of another human with malice aforethought. ("The killing of another person without justification or excuse, especially the ...
and
rape Rape is a type of sexual assault usually involving sexual intercourse or other forms of sexual penetration carried out against a person without their consent. The act may be carried out by physical force, coercion, abuse of authority, or ...
, although penalties for these crimes may vary from state to state.
Capital punishment Capital punishment, also known as the death penalty, is the state-sanctioned practice of deliberately killing a person as a punishment for an actual or supposed crime, usually following an authorized, rule-governed process to conclude that ...
is permitted in some states but not others. Three strikes laws in certain states impose harsh penalties on repeat offenders. Some states distinguish between two levels: felonies and misdemeanors (minor crimes). Generally, most felony convictions result in lengthy
prison A prison, also known as a jail, gaol (dated, standard English, Australian, and historically in Canada), penitentiary (American English and Canadian English), detention center (or detention centre outside the US), correction center, corre ...
sentences as well as subsequent probation, large
fines Fines may refer to: * Fines, Andalusia, Spanish municipality * Fine (penalty) * Fine, a dated term for a premium on a lease of land, a large sum the tenant pays to commute (lessen) the rent throughout the term *Fines, ore or other products with a s ...
, and orders to pay restitution directly to victims; while misdemeanors may lead to a year or less in jail and a substantial fine. To simplify the prosecution of traffic violations and other relatively minor crimes, some states have added a third level, infractions. These may result in fines and sometimes the loss of one's driver's license, but no jail time. On average, only three percent of criminal cases are resolved by jury trial; 97 percent are terminated either by plea bargaining or dismissal of the charges. For public welfare offenses where the state is punishing merely risky (as opposed to injurious) behavior, there is significant diversity across the various states. For example, punishments for drunk driving varied greatly prior to 1990. State laws dealing with drug crimes still vary widely, with some states treating possession of small amounts of drugs as a misdemeanor offense or as a medical issue and others categorizing the same offense as a serious
felony A felony is traditionally considered a crime of high seriousness, whereas a misdemeanor is regarded as less serious. The term "felony" originated from English common law (from the French medieval word "félonie") to describe an offense that res ...
. The law of criminal procedure in the United States consists of a massive overlay of federal constitutional case law interwoven with the federal and state statutes that actually provide the foundation for the creation and operation of law enforcement agencies and prison systems as well as the proceedings in criminal trials. Due to the perennial inability of legislatures in the U.S. to enact statutes that would actually force law enforcement officers to respect the constitutional rights of criminal suspects and convicts, the federal judiciary gradually developed the exclusionary rule as a method to enforce such rights. In turn, the exclusionary rule spawned a family of judge-made remedies for the abuse of law enforcement powers, of which the most famous is the Miranda warning. The writ of ''
habeas corpus ''Habeas corpus'' (; from Medieval Latin, ) is a recourse in law through which a person can report an unlawful detention or imprisonment to a court and request that the court order the custodian of the person, usually a prison official, ...
'' is often used by suspects and convicts to challenge their detention, while the
Third Enforcement Act The Enforcement Act of 1871 (), also known as the Ku Klux Klan Act, Third Enforcement Act, Third Ku Klux Klan Act, Civil Rights Act of 1871, or Force Act of 1871, is an Act of the United States Congress which empowered the President to suspend ...
and '' Bivens'' actions are used by suspects to recover tort damages for police brutality.


Civil procedure

The law of civil procedure governs process in all judicial proceedings involving lawsuits between private parties. Traditional common law pleading was replaced by code pleading in 24 states after New York enacted the Field Code in 1850 and code pleading in turn was subsequently replaced again in most states by modern notice pleading during the 20th century. The old English division between common law and
equity Equity may refer to: Finance, accounting and ownership *Equity (finance), ownership of assets that have liabilities attached to them ** Stock, equity based on original contributions of cash or other value to a business ** Home equity, the diff ...
courts was abolished in the federal courts by the adoption of the Federal Rules of Civil Procedure in 1938; it has also been independently abolished by legislative acts in nearly all states. The Delaware Court of Chancery is the most prominent of the small number of remaining equity courts. Thirty-five states have adopted rules of civil procedure modeled after the FRCP (including rule numbers). However, in doing so, they had to make some modifications to account for the fact that state courts have broad general jurisdiction while federal courts have relatively limited jurisdiction. New York, Illinois, and California are the most significant states that have not adopted the FRCP. Furthermore, all three states continue to maintain most of their civil procedure laws in the form of codified statutes enacted by the state legislature, as opposed to court rules promulgated by the state supreme court, on the ground that the latter are undemocratic. But certain key portions of their civil procedure laws have been modified by their legislatures to bring them closer to federal civil procedure. Generally, American civil procedure has several notable features, including extensive pretrial
discovery Discovery may refer to: * Discovery (observation), observing or finding something unknown * Discovery (fiction), a character's learning something unknown * Discovery (law), a process in courts of law relating to evidence Discovery, The Discove ...
, heavy reliance on live testimony obtained at
deposition Deposition may refer to: * Deposition (law), taking testimony outside of court * Deposition (politics), the removal of a person of authority from political power * Deposition (university), a widespread initiation ritual for new students practiced f ...
or elicited in front of a
jury A jury is a sworn body of people (jurors) convened to hear evidence and render an impartial verdict (a finding of fact on a question) officially submitted to them by a court, or to set a penalty or judgment. Juries developed in England d ...
, and aggressive pretrial "law and motion" practice designed to result in a pretrial disposition (that is, summary judgment) or a settlement. U.S. courts pioneered the concept of the opt-out
class action A class action, also known as a class-action lawsuit, class suit, or representative action, is a type of lawsuit where one of the parties is a group of people who are represented collectively by a member or members of that group. The class actio ...
, by which the burden falls on class members to notify the court that they do not wish to be bound by the judgment, as opposed to opt-in class actions, where class members must join into the class. Another unique feature is the so-called American Rule under which parties generally bear their own attorneys' fees (as opposed to the
English Rule In the field of law and economics, the English rule is a rule controlling assessment of lawyers' fees arising out of litigation. The English rule provides that the party that loses in court pays the other party's legal costs. The English rule contr ...
of "loser pays"), though American legislators and courts have carved out numerous exceptions.


Contract law

Contract law A contract is a legally enforceable agreement between two or more parties that creates, defines, and governs mutual rights and obligations between them. A contract typically involves the transfer of goods, services, money, or a promise to t ...
covers obligations established by agreement (express or implied) between private parties. Generally, contract law in transactions involving the sale of goods has become highly standardized nationwide as a result of the widespread adoption of the Uniform Commercial Code. However, there is still significant diversity in the interpretation of other kinds of contracts, depending upon the extent to which a given state has codified its common law of contracts or adopted portions of the Restatement (Second) of Contracts. Parties are permitted to agree to
arbitrate Arbitration is a form of alternative dispute resolution (ADR) that resolves disputes outside the judiciary courts. The dispute will be decided by one or more persons (the 'arbitrators', 'arbiters' or 'arbitral tribunal'), which renders the ' ...
disputes arising from their contracts. Under the Federal Arbitration Act (which has been interpreted to cover ''all'' contracts arising under federal or state law), arbitration clauses are generally enforceable unless the party resisting arbitration can show unconscionability or
fraud In law, fraud is intentional deception to secure unfair or unlawful gain, or to deprive a victim of a legal right. Fraud can violate civil law (e.g., a fraud victim may sue the fraud perpetrator to avoid the fraud or recover monetary compen ...
or something else which undermines the entire contract.


Tort law

Tort law generally covers any civil action between private parties arising from wrongful acts which amount to a breach of general obligations imposed by law and not by contract. This broad family of civil wrongs involves interference "with person, property, reputation, or commercial or social advantage." Tort law covers the entire imaginable spectrum of wrongs which humans can inflict upon each other, and partially overlaps with wrongs also punishable by criminal law. It is primarily a matter of state law and is usually developed through case law from state appellate courts; it is rarely a matter of federal law, and tort-related statutes are focused on discrete issues like authorizing wrongful death claims (which did not exist at common law). Although the American Law Institute has attempted to standardize tort law through the development of several versions of the Restatement of Torts, many states have chosen to adopt only certain sections of the Restatements and to reject others. Thus, because of its immense size and diversity, American tort law cannot be easily summarized. For example, a few jurisdictions allow actions for negligent infliction of emotional distress even in the absence of physical injury to the plaintiff, but most do not. For any particular tort, states differ on the causes of action, types and scope of remedies, statutes of limitations, and the amount of specificity with which one must plead the cause. With practically any aspect of tort law, there is a "majority rule" adhered to by most states, and one or more "minority rules." Notably, the most broadly influential innovation of 20th-century American tort law was the rule of
strict liability In criminal and civil law, strict liability is a standard of liability under which a person is legally responsible for the consequences flowing from an activity even in the absence of fault or criminal intent on the part of the defendant. ...
for defective products, which originated with judicial glosses on the law of warranty. In 1963, Roger J. Traynor of the
Supreme Court of California The Supreme Court of California is the Supreme court, highest and final court of appeals in the judiciary of California, courts of the U.S. state of California. It is headquartered in San Francisco at the Earl Warren Building, but it regularly h ...
threw away
legal fiction A legal fiction is a fact assumed or created by courts, which is then used in order to help reach a decision or to apply a legal rule. The concept is used almost exclusively in common law jurisdictions, particularly in England and Wales. Deve ...
s based on warranties and imposed strict liability for defective products as a matter of
public policy Public policy is an institutionalized proposal or a decided set of elements like laws, regulations, guidelines, and actions to solve or address relevant and real-world problems, guided by a conception and often implemented by programs. Public ...
in the landmark case of ''Greenman v. Yuba Power Products''. The American Law Institute subsequently adopted a slightly different version of the ''Greenman'' rule in Section 402A of the ''Restatement (Second) of Torts'', which was published in 1964 and was very influential throughout the United States. Outside the U.S., the rule was adopted by the European Economic Community in the Product Liability Directive of July 1985, by Australia in July 1992, and by Japan in June 1994. By the 1990s, the avalanche of American cases resulting from ''Greenman'' and Section 402A had become so complicated that another restatement was needed, which occurred with the 1997 publication of the ''Restatement (Third) of Torts: Products Liability''.


Property law

Historically, American property law has been heavily influenced by English land law, and is therefore concerned with real property first and personal property second. It is also primarily a matter of state law, and the level of interstate diversity in the law of property is much more substantial than in contract and tort. In the 1970s, the Uniform Law Commission's project to standardize state real property law was a spectacular failure.Peter B. Maggs
''The Uniform Simplification of Land Transfers Act and the Politics and Economics of Law Reform,''
20 Nova L. Rev. 1091, 1091–92 (1996).
The majority of states use a title recording system (coupled with privately provided title insurance) to manage title to real property, although
title registration Torrens title is a land registration and land transfer system, in which a state creates and maintains a register of land holdings, which serves as the conclusive evidence (termed " indefeasibility") of title of the person recorded on the registe ...
(''Torrens'' title) is also allowed in a small minority of states. Title to personal property is usually not registered, with the notable exceptions of
motor vehicle A motor vehicle, also known as motorized vehicle or automotive vehicle, is a self-propelled land vehicle, commonly wheeled, that does not operate on rails (such as trains or trams) and is used for the transportation of people or cargo. The ...
s (through a state department of motor vehicles or equivalent), bicycles (in certain cities and counties), and some types of firearms (in certain states).


Family law

In the United States, family law governs relationships between adults, and relationships between parents and their children. As a discrete area of law worthy of its own specialists and law professors, American family law is relatively young in comparison to European family law; it did not take flight until the no-fault divorce revolution of the 1960s. Before the 1950s, widespread religious, legal, and social prohibitions against divorce in the United States meant that divorces were rare, were often seen as fact-driven matters (meaning that they were perceived as turning on each case's facts and not broadly generalizable legal principles), and rarely went up on appeal. The rise of no-fault divorce caused divorce litigation to shift away from the question of who was at fault for the collapse of the marital relationship and to focus instead on issues such as
division of property Division of property, also known as equitable distribution, is a judicial division of property rights and obligations between spouses during divorce. It may be done by agreement, through a property settlement, or by judicial decree. Distributio ...
, spousal support, and
child support Child support (or child maintenance) is an ongoing, periodic payment made by a parent for the financial benefit of a child (or parent, caregiver, guardian) following the end of a marriage or other similar relationship. Child maintenance is paid d ...
. Family cases are traditionally a matter of state law and are virtually always heard only in state courts. Certain kinds of contract, tort, and property civil actions involving state law issues can be heard in federal courts under diversity jurisdiction, but federal courts decline to hear family cases under the "domestic relations exception" to diversity jurisdiction. Although family cases are heard in state courts, there has been a trend towards federalization of certain specific issues in family law. State courts and the lawyers who practice before them must be aware of federal income tax and bankruptcy implications of a divorce judgment, federal constitutional rights to abortion and paternity, and federal statutes governing interstate child custody disputes and interstate child support enforcement.


See also

* Admission to the bar in the United States * Attorneys in the United States *'' Black's Law Dictionary'' *
Courts of the United States The courts of the United States are closely linked hierarchical systems of courts at the federal and state levels. The federal courts form the judicial branch of the US government and operate under the authority of the United States Constitution a ...
* Legal education in the United States ** Law school in the United States * Legal systems of the world * Privacy laws of the United States


Lists

*
Legal research in the United States Legal research is the process of identifying and retrieving information to support legal arguments and decisions. Finding relevant legal information can be challenging and may involve the use of electronic research tools as well as printed books ...
* List of sources of law in the United States * List of Uniform Acts (United States)—intended for state-level legislation * List of United States federal legislation * List of United States Supreme Court cases


References


Further reading

* Friedman, Lawrence M. ''American Law'' (1984) * Hadden, Sally F. and Brophy, Alfred L. (eds.), ''A Companion to American Legal History.'' Malden, MA: Wiley-Blackwell, 2013. * Hall, Kermit L. et al. eds. ''The Oxford Companion to American Law'' (2002
excerpt and text search
*


Legal history

* Edwards, Laura F. ''A Legal History of the Civil War and Reconstruction: A Nation of Rights'' (Cambridge University Press, 2015) 212 pp. * Friedman, Lawrence M. ''A History of American Law'' (3rd ed. 2005) 640 pp * Friedman, Lawrence M. ''American Law in the Twentieth Century'' (2002) * Hall, Kermit L. ''The Magic Mirror: Law in American History'' (1989) * Hall, Kermit L. et al. ''American Legal History: Cases and Materials'' (2010); 752 pages * Horwitz, Morton J. ''The transformation of American law: 1780–1860'' (1977) * Hovenkamp, Herbert ''The Opening of American Law: Neoclassical Legal Thought, 1870–1970'' (2015) * Horwitz, Morton J. ''The transformation of American law, 1870–1960: the crisis of legal orthodoxy (1994) * Howe, Mark de Wolfe, ed. ''Readings in American Legal History'' (2001) 540pp * Johnson, Herbert A. ''American legal and constitutional history: cases and materials'' (2001) 733 pp * *Schwartz, Bernard. ''The Law in America''. (Evolution of American legal institutions since 1790). (1974).


Colonial

* *


Lawyers

* Abel, Richard L. ''American Lawyers'' (1991) * Chroust, Anton-Hermann. ''The Rise of the legal profession in America'' (2 vol 1965), to 1860 * Drachman, Virginia G. ''Sisters in Law: Women Lawyers in Modern American History'' (2001) *Nizer, Louis. '' My Life in Court''. (1978) Popular description of a lawyer's practice * Vile, John R. ''Great American lawyers: an encyclopedia'' (2001) * Vile, John R. ''Great American judges: an encyclopedia'' (2003) * Wortman, Marlene Stein. ''Women in American Law: From colonial times to the New Deal'' (1985)


Philosophy of law

*Cardozo, Benjamin N., ed. ''An Introduction to Law''. (1957). (Essays by eight distinguished American judges) *Hart, H.L.A. ''The Concept of Law''. (1961). (Introductory text on the nature of law) *Llewellyn, Karl N. "The Bramble Bush," in ''Karl N. Llewellyn on Legal Realism''. (1986). (Introductory text on the nature of law) *Pound, Roscoe. ''Social Control Through Law''. (Nature of law and its role in society). (1942)


External links


Official U.S. Government page on Laws and Legal IssuesOfficial U.S. Government page for U.S. federal courtsTexts of U.S. federal laws and U.S. state lawsU.S. Code collection
at Cornell University's Legal Information Institute {{DEFAULTSORT:Law Of The United States