Part I. Introduction: 1. Introduction: what is international criminal law?; 2. The aims, objectives and justification of international criminal law; Part II. Prosecutions in National Courts: 3. Jurisdiction; 4. National prosecutions of international crimes; 5. State cooperation with respect to national proceedings; Part III. International Prosecutions: 6. The history of international criminal prosecutions: Nuremberg and Tokyo; 7. The ad hoc international criminal tribunals; 8. The International Criminal Court; 9. Other courts with international elements; Part IV. Substantive Law of International Crimes: 10. Genocide; 11. Crimes against humanity; 12. War crimes; 13. Aggression; 14. Transitional crimes, terrorism and torture; 15. General principles of liability; 16. Defences/grounds for excluding criminal responsibility; Part V. Principles and Procedures of International Prosecutions: 17. Procedures of international criminal investigations and prosecutions; 18. Victims in the international criminal process; 19. Sentencing and penalties; Part VI. Relationship between National and International Systems: 20. State cooperation with the International Courts and Tribunals; 21. Immunities; 22. Alternative and complements to criminal prosecution; 23. The future of international criminal law.