The significance of the Nuremberg trials lies in a single legal shift: individuals, including heads of state and senior officials, can be held personally criminally responsible under international law for waging aggressive war and committing atrocities against civilians. The International Military Tribunal that sat from November 1945 through October 1946 convicted 19 of 21 defendants and produced a framework built on four categories of crime — conspiracy, crimes against peace, war crimes, and crimes against humanity — that still governs how the world prosecutes mass violence.1Avalon Project. Charter of the International Military Tribunal Every major institution of international criminal law that followed, from the Genocide Convention to the International Criminal Court, traces its lineage to what happened in that courtroom.
What the Charter Changed About Personal Responsibility
Before Nuremberg, two doctrines shielded the people who organized state violence from any court outside their own government. Sovereign immunity treated a head of state as the embodiment of the state itself, beyond the reach of foreign judges. The defense of superior orders let soldiers and officials point up the chain of command and say the responsibility was not theirs. The Charter of the International Military Tribunal dismantled both.
Article 7 declared that a defendant’s official position — head of state, cabinet minister, senior official — would neither excuse responsibility nor reduce punishment. Article 8 addressed the flip side, providing that following the orders of a government or a superior was not a defense, though the Tribunal could consider such orders in setting a sentence.1Avalon Project. Charter of the International Military Tribunal The Tribunal did not accept the superior orders defense for any of the 21 defendants who stood trial.2The Army Lawyer. Practice Notes – Training the Defense of Superior Orders
The practical effect was a reordering of duty. International obligations now sat above national chains of command. A general, a minister, or a head of state could no longer point upward or outward to escape accountability, and a subordinate could not treat a criminal order as a shield. Every participant in systematic atrocities carries a personal duty to judge the legality of what they are doing.
The Invention of Crimes Against Humanity
The most consequential legal innovation was the category itself. Article 6(c) of the Charter created “crimes against humanity” to cover murder, extermination, enslavement, deportation, and other inhumane acts committed against any civilian population, along with persecution on political, racial, or religious grounds.1Avalon Project. Charter of the International Military Tribunal
Traditional law of war regulated how belligerent nations treated each other’s soldiers and populations. It had little to say about a government brutalizing its own people. The words “any civilian population” changed that. Nazi officials could now be prosecuted for atrocities committed against German citizens — Jews, Roma, political dissidents, disabled people — not just against foreign nationals in occupied countries. The old wall between a state’s internal affairs and international concern came down.
The Charter did impose a limit. Crimes against humanity had to occur “in execution of or in connection with” a crime against peace or a war crime, tying them to the broader conflict. That nexus requirement was later dropped. The Rome Statute of the International Criminal Court now treats crimes against humanity as independently prosecutable, with no need to link them to armed conflict at all.3International Criminal Court. How the Court Works
The Verdicts That Showed It Was a Trial
The Tribunal indicted 24 senior Nazi officials; 21 stood trial. On October 1, 1946, it convicted 19 and acquitted three: Hjalmar Schacht, Franz von Papen, and Hans Fritzsche. The Soviet judge dissented, calling the acquittals “unfounded.”4Avalon Project. Judgement – Dissenting Opinion
Those acquittals matter to the trial’s significance. A predetermined show trial does not release defendants. The fact that three of them walked free is evidence that the judges were weighing the case against each individual, not simply ratifying a collective verdict — which is exactly the standard the Charter demanded when it made responsibility personal.5United States Holocaust Memorial Museum. International Military Tribunal at Nuremberg
The Nuremberg Principles
The trial’s rules did not stay locked inside its own record. In December 1946, the United Nations General Assembly unanimously adopted Resolution 95(I), affirming the legal principles recognized in the Charter and the judgment.6International Committee of the Red Cross. United Nations Principles for the Nuremberg Tribunal, 1946 The General Assembly then asked the International Law Commission to formalize them. In 1950, the Commission produced seven Nuremberg Principles:7United Nations International Law Commission. Principles of International Law Recognized in the Charter of the Nuremberg Tribunal and in the Judgment of the Tribunal
- Principle I. Anyone who commits an act that qualifies as a crime under international law is personally responsible and can be punished.
- Principle II. The absence of a penalty under domestic law does not relieve someone of responsibility under international law.
- Principle III. Acting as a head of state or senior government official provides no immunity.
- Principle IV. Following orders from a government or superior is no defense, as long as the person had a genuine moral choice.
- Principle V. Every person charged with a crime under international law has the right to a fair trial.
- Principle VI. Crimes against peace, war crimes, and crimes against humanity are all punishable under international law.
- Principle VII. Complicity in any of these crimes is itself a crime.
These seven rules became the working code of modern international criminal law. The 1948 Genocide Convention, the first human rights treaty adopted by the UN General Assembly, drew directly on the evidence and reasoning produced at Nuremberg. It defined genocide as an independent crime and, echoing Article 7 of the Charter, declared that perpetrators would be punished “whether they are constitutionally responsible rulers, public officials or private individuals.”8Office of the United Nations High Commissioner for Human Rights. Convention on the Prevention and Punishment of the Crime of Genocide
From Nuremberg to the International Criminal Court
Robert Jackson, the chief prosecutor, called the Tribunal “novel and experimental.” It took nearly fifty years to build a permanent institution on those foundations, but the line of descent is direct.
Atrocities in the former Yugoslavia and Rwanda pushed the UN Security Council to create the first international criminal tribunals since the postwar era. The International Criminal Tribunal for the former Yugoslavia, established in 1993, was explicitly modeled on the Nuremberg precedent. The International Criminal Tribunal for Rwanda followed in 1994, extending the same principles to a civil conflict and confirming that crimes against humanity applied whether or not violence crossed a national border.
Those ad hoc tribunals built the momentum for a permanent court. The Rome Statute, adopted in 1998, created the International Criminal Court with standing jurisdiction over genocide, crimes against humanity, war crimes, and — after amendments activated in 2018 — the crime of aggression.3International Criminal Court. How the Court Works Each of those four categories traces back to Article 6 of the Nuremberg Charter.
The subsequent trials held at Nuremberg from 1945 to 1949 added their own layers to the legacy. The Doctors’ Trial produced the Nuremberg Code, still foundational to medical ethics on human experimentation. The Justice Trial, prosecuting Nazi judges, established that lawyers and judges who weaponize the legal system to enable atrocities bear personal criminal responsibility for what they help produce. The judges in that case rejected the argument that wartime atrocities could only be punished under the laws of armed conflict, holding that killings in the concentration camps “were acts of such scope and malevolence, and they so clearly imperiled the peace of the world, that they must be deemed to have become violations of international law.”9The Army Lawyer. 10IRMCT Case Law Database. Nullum Crimen Sine Lege No international statute, they said, had criminalized aggressive war before the London Charter created one. The Tribunal acknowledged the principle but concluded that the crimes were so destructive of international order that the defendants could not reasonably have believed their conduct was lawful. Later tribunals reinforced that reasoning, treating the offenses as reflections of pre-existing norms even where no specific statute had spelled them out.11The Army Lawyer. Lore of the Corps – The Nuremberg Trials at 75
Neither criticism erases what the trials achieved, and neither should be waved away. The victor’s justice problem was real; it meant the process was incomplete, not that the defendants were innocent. The retroactivity concern was legally serious but hard to sustain when applied to industrialized genocide. The clearer measure of significance is what came after. The international community took the principles from an imperfect trial and built them into treaties, conventions, and a permanent court meant to apply the same rules to every nation. That project is unfinished. It began in Nuremberg.