1 Introduction – 2 Significance and Objectives of Paper – 3 Crimes Affecting Internationally – 3.1 Genocide – 3.2 Crime Against Humanity – 3.3 War Crimes – 3.4 Crime of Aggression – 3.5 Ethnic Cleansing – 4 Tribunals of International Criminal Law – 5 Difference between the International Criminal Court and the International Court of Justice – 6 Principles Relating to International Criminal Law – 7 Conclusion and Future Scope – References.