Which was a fundamental principle expressed by the war crimes tribunal at Nuremberg following world war 2?

A fundamental principle expressed by the Nuremberg War Crimes Tribunal was that individuals, including state leaders, can be held accountable for crimes against humanity, including war crimes and genocide. This established the precedent that following orders or acting under national law does not exempt individuals from responsibility for their actions. The tribunal emphasized the importance of justice and the rule of law, asserting that moral and ethical standards transcend national boundaries. This principle laid the groundwork for modern international law and the prosecution of war crimes.