In 1993, the United Nations Security Council set up an ad hoc tribunal to bring to trial those accused of the worst breaches of humanitarian law in the war-torn former Yugoslavia, thus setting in motion a process which has significantly raised the profile and importance of international criminal justice. Whether through a proliferation of international criminal courts and tribunals, or by the many pronouncements in domestic courts on international crimes, the patchwork of disparate rules, principles, conventions, and treaties is now taking discernible shape, and a distinct corpus of law...