The study of international crimes, like war crimes, crimes against humanity and genocide, deserves to grow into a separate and fully fledged specialization within criminology: supranational criminology. Supranational criminology entails the study of international crimes, behaviour that shows affinity with these crimes, the causes and the situations in which they are committed, as well as interventions and their effectiveness. Interventions comprise penal systems # domestic, internationalised, supranational # in which the crimes are prosecuted and tried, as well as non-penal interventions. International crimes are studied from a criminological perspective, using the theoretical framework and research methodology of regular criminology. By integrating all research done in other disciplines, like history, political science, sociology and psychology, criminology may contribute to the prevention of these kinds of extreme violence. What exactly entails supranational criminology? What are international crimes? Should other forms of behaviour also be qualified as international crimes? The specific characteristics of international crimes as forms of state sponsored or state facilitated crimes have to be studied. The particular methodological difficulties which arise when studying international crimes form another research topic. Explanatory theories have to be developed which can be translated into testable hypotheses. Which theories from mainstream criminology can provide answers for the prevalence or causes of international crimes? Have the international courts and tribunals succeeded in their aim? The number of topics to be studied is sheer unlimited. This book aims to repair the fundamental and historical neglect of criminology and to break out of a state of denial by putting international crimes on the criminological agenda.