Disputed Statements

Canon Law, Legal Systems

Standing Scholarly debate

Concerns Origin Year

Currently States 1140

Legal historians commonly date the birth of canon law as an autonomous legal science to around 1140, when the monk Gratian compiled and systematically reconciled centuries of conflicting canons in his Decretum at Bologna, a work later comparative-law scholarship (Harold Berman among others) credits with shaping the method of the whole Western legal tradition. Councils and collections of canons existed for centuries before Gratian, so an earlier origin point is also defensible depending on whether systematic legal science or the raw body of canons is meant.

Source Major Legal Systems in the World Today, Rene David and John E.C. Brierley

Civil Law, Legal Systems

Standing Scholarly debate

Concerns Origin Year

Currently States 1804

1804, the enactment of the Napoleonic Code, is taken here as the origin of the modern codified civil law tradition, since it was the model most widely adopted or adapted by other nations. The tradition intellectual roots are far older, tracing to Roman law and particularly to Justinian own sixth century Corpus Juris Civilis, so which date counts as origin depends on whether the Roman legal inheritance or its modern codified form is meant.

Source Major Legal Systems in the World Today, Rene David and John E.C. Brierley

Common Law, Legal Systems

Standing Scholarly debate

Concerns Origin Year

Currently States 1066

1066, the Norman Conquest of England, is often cited as the starting point of a unified English common law, since the Norman kings began sending royal judges on circuit to apply law common to the whole kingdom rather than varying by local custom. The consolidation is more properly a gradual process spanning the eleventh through thirteenth centuries, with the reforms of Henry II in the twelfth century particularly significant, so no single year marks the system true origin.

Source Major Legal Systems in the World Today, Rene David and John E.C. Brierley

Habeas Corpus, Doctrines

Standing Scholarly debate

Concerns Core Principle

Currently States The Suspension Clause of the United States Constitution (Article I, Section 9, Clause 2) permits Congress to suspend habeas corpus only in cases of rebellion or invasion when the public safety requires it, and only Congress, not the Executive, holds that power; how far the Clause reaches was contested in litigation over Guantanamo Bay detainees following the Detainee Treatment Act of 2005 and the Military Commissions Act of 2006, until the Supreme Court held in Boumediene v Bush (2008) that the Suspension Clause affirmatively guaranteed habeas review even for alien enemy combatants held outside the United States.

How far the constitutional right to habeas review extends beyond sovereign United States territory, and to whom, remains a genuinely contested question in wartime and national-security litigation.

Source Habeas Corpus (Legal Information Institute, Cornell Law School)

Halakha, Legal Systems

Standing Scholarly debate

Concerns Origin Year

Currently States 200

Comparative-law treatments often point to the codification of the Mishnah, traditionally dated to around 200 CE under Judah ha-Nasi, as the moment Jewish law took a systematized, citable legal form, while the tradition itself traces the law further back to the written and oral Torah, so which point counts as origin depends on whether codification or the older textual inheritance is meant.

Source Major Legal Systems in the World Today, Rene David and John E.C. Brierley

International Court of Justice, Courts

Standing Scholarly debate

Concerns Founding Year

Currently States 1945

1945 is the year the United Nations Charter, which established the Court, was signed. The Court itself began hearing cases the following year, 1946, so 1946 is sometimes cited instead as the year it became operational.

Source Encyclopaedia Britannica

International Criminal Court, Courts

Standing Scholarly debate

Concerns Founding Year

Currently States 2002

2002 is the year the Rome Statute entered into force and the Court formally came into being. The Rome Statute itself was adopted in 1998, so 1998 is sometimes cited instead as the founding year.

Source Encyclopaedia Britannica

Judicial Review, Doctrines

Standing Scholarly debate

Concerns Core Principle

Currently States Judicial review in the United States operates alongside qualified immunity, a judicially created doctrine shielding government officials from civil liability under 42 U.S.C. Section 1983 unless they violated a clearly established right; the doctrine's own textual basis is disputed. Justice Clarence Thomas, concurring in Ziglar v Abbasi (2017), wrote that the Court's own qualified immunity framework substitutes its own policy preferences for the mandates of Congress, and other judges and scholars have argued the doctrine lacks support in the statute's own text or legislative history.

Whether qualified immunity is a legitimate judicial gloss on Section 1983 or an unsupported judicial invention is a live and unresolved dispute among sitting justices and scholars, not a settled question.

Source Qualified Immunity (Wikipedia) tier 2

M'Naghten Rules, Doctrines

Standing Scholarly debate

Concerns Core Principle

Currently States Whether the M'Naghten Rules remain the right test for criminal insanity is a live and unsettled question: some United States states use it as adopted, others have replaced it with the Model Penal Code's broader substantial-capacity test, which excuses a defendant who lacks substantial capacity either to appreciate the wrongfulness of the conduct or to conform conduct to the law, and a handful of states, including Kansas, Montana, Idaho and Utah, have abolished an independent insanity defense altogether, permitting mental illness to be raised only to negate the required mental state (mens rea).

Which test best balances moral culpability against the reality of mental illness remains genuinely contested among criminal law scholars and legislatures, evidenced by the continuing split among jurisdictions.

Source M'Naghten Rules (Wikipedia) tier 2

Precedent (Stare Decisis), Doctrines

Standing Scholarly debate

Concerns Core Principle

Currently States How much deference a precedent is owed, and when it may be overruled, is itself contested: the Supreme Court has said stare decisis is not an inexorable command and may yield when a decision is unworkable or badly reasoned, but critics argue the Court applies that standard selectively, as in Dobbs v Jackson Women's Health Organization (2022), whose majority opinion held that Roe v Wade was egregiously wrong from the start and that its reasoning was exceptionally weak, while the joint dissent by Justices Breyer, Sotomayor and Kagan wrote, with sorrow, for this Court, but more, for the many millions of American women who have today lost a fundamental constitutional protection, we dissent.

Whether the Dobbs majority applied a principled stare decisis standard or one result-driven exception is a genuinely contested question among justices and scholars, not a settled one.

Source Dobbs v. Jackson Women's Health Organization (Wikipedia) tier 2

Proportionality, Doctrines

Standing Scholarly debate

Concerns Core Principle

Currently States United States constitutional law has generally declined to adopt a general proportionality test of the kind used in Germany and the European Union, relying instead on categorical tiers of scrutiny (rational basis, intermediate and strict scrutiny); whether the United States should move toward a general proportionality approach is a live debate among constitutional scholars, some arguing it would make the balancing that tiered scrutiny already performs implicitly more transparent, others arguing it would hand courts too open-ended a licence to override legislative judgments.

Whether proportionality or tiered categorical scrutiny is the more disciplined method of constitutional review is a genuinely unsettled comparative law debate, not a resolved one.

Source Proportionality (Law) (Wikipedia) tier 2

Rabbinical Courts of Israel, Courts

Standing Scholarly debate

Concerns Founding Year

Currently States 1953

Religious courts for Jewish personal status operated in Palestine under the British Mandate from the 1920s; 1953 is the year the Rabbinical Courts Jurisdiction (Marriage and Divorce) Law gave the courts of the new State of Israel their current statutory, exclusive jurisdiction, which is the founding date comparative-law treatments of the modern system generally use.

Source Rabbinical Courts Jurisdiction (Marriage and Divorce) Law, 5713-1953, Israel

Rule Against Perpetuities, Doctrines

Standing Scholarly debate

Concerns Core Principle

Currently States Whether the rule should survive at all is now itself contested: at least six United States states have repealed it outright to permit dynasty trusts of indefinite duration, and others have extended the permitted vesting period to three hundred and sixty years or more, which trusts-and-estates scholars are divided over as either a sound modernization freeing property owners from a rule whose purposes no longer apply, or an abandonment of the rule's original function of preventing the dead hand of a settlor from controlling property indefinitely.

The scope of the modern reform, and whether it has hollowed out the rule's original anti-dead-hand purpose, is a live and unsettled debate among trusts-and-estates scholars rather than a settled question.

Source Rule Against Perpetuities (Wikipedia) tier 2

Scots Law, Legal Systems

Standing Scholarly debate

Concerns Origin Year

Currently States 1707

1707, the Acts of Union that merged the Scottish and English Parliaments while Article 19 of the Treaty of Union expressly preserved the courts of Scotland and its law, is taken here as the point Scots law became formally and permanently a distinct system rather than a candidate for full merger into English law. Its own roots are far older, tracing through twelfth century feudal reform and, from the fifteenth century, growing Roman law influence, so which date counts as origin depends on whether the formal preservation or the deeper legal inheritance is meant.

Separation of Powers, Doctrines

Standing Scholarly debate

Concerns Core Principle

Currently States Separation of powers is enforced in United States federal courts partly through the political question doctrine, under which a court declines to resolve an issue the Constitution textually commits to a coordinate political branch, for which there are no judicially manageable standards, or which would require a policy judgment properly left to the elected branches, following the six-factor test set out in Baker v Carr (1962). The doctrine's own boundaries are contested and its application inconsistent, invoked far more readily in foreign-affairs cases than in domestic ones.

How consistently, and how far, the political question doctrine should limit judicial review of the political branches remains genuinely disputed among judges and scholars.

Source Political Question Doctrine (Legal Information Institute, Cornell Law School)

Sharia, Legal Systems

Standing Scholarly debate

Concerns Origin Year

Currently States 632

632, the death of Muhammad, is sometimes taken as the point at which systematic juristic derivation of law from revelation began, but comparative-law scholarship more often dates the crystallization of Sharia as a working legal system, with its classical schools of jurisprudence and settled methodology, to the eighth through tenth centuries, so no single year is agreed.

Source Major Legal Systems in the World Today, Rene David and John E.C. Brierley

Sharia Courts of Saudi Arabia, Courts

Standing Scholarly debate

Concerns Founding Year

Currently States 1970

Qadi courts applying Sharia predate the modern Saudi state by centuries; 1970 is when King Faisal created a Ministry of Justice to administer the courts, and the 1975 Law of the Judiciary then organized the modern hierarchy of general and summary courts under a Supreme Judicial Council, so the 1970 to 1975 window, not a single year, is when the current system took shape.

Source Ministry of Justice History, Saudi Arabia

South African Law, Legal Systems

Standing Scholarly debate

Concerns Origin Year

Currently States 1652

1652, Dutch settlement at the Cape of Good Hope that introduced Roman-Dutch law, is taken here as the origin of the civil law component; English common law layered on only after the 1806 British takeover of the Cape, and the system as a genuinely mixed one did not take its present shape until later still, so which date counts as origin depends on which layer is meant, the same choice already recorded for the origin year of civil law in this atlas.

The Nuremberg Trials, Landmark Cases

Standing Scholarly debate

Concerns Decision Year

Currently States 1946

1946 is the year the main Trial of the Major War Criminals concluded, before the International Military Tribunal. The Nuremberg Trials as a whole comprised that main trial and twelve further subsequent trials, and ran in total from 1945 to 1949, so no single year covers the whole series.

Source Black's Law Dictionary, Bryan A. Garner, editor; founded by Henry Campbell Black

Tribunal of the Roman Rota, Courts

Standing Scholarly debate

Concerns Founding Year

Currently States 1331

The Rota traces informally to the twelfth century, when papal chaplains recorded testimony in cases the Pope alone judged, and became a collegiate tribunal in the thirteenth century; 1331 marks Pope John XXII bull Ratio Juris, which first laid down settled rules for it, so no single founding year is agreed among historians of the tribunal.

Source Institutional Profile, Tribunal of the Roman Rota (Vatican)