Extract from the foreword by Mohan Pieris President's Counsel Former Chief Justice of the Supreme Court of Sri Lanka Attorney General (retd.) Crime of aggression is regarded as one of the core crimes under the international criminal law. This book seeks to identify the elements of the international crime of aggression. The book concentrates on the definitional, legal and jurisdictional aspects of crime of aggression. The book provides an objective, analytical overview of the history and major developments relating to aggression. It covers the developments prior to the adoption of the Charter of the Rome and those subsequent to the adoption of the Charter. It includes the constituent instruments and the jurisprudence of the tribunals that considered the crimes against peace committed in Europe and the Far East during the Second World War, namely: the Charter and Judgment of the Nuremberg Tribunal and Tokyo Tribunal. This book would be beneficial to the academicians, students in understanding the concept of aggression.