The International Criminal Court has ushered in a new era in the protection of human rights. Protecting against genocide, crimes against humanity and war crimes, the Court acts when national justice systems are unwilling or unable to do so. Written by the leading expert in the field, the fourth edition of this seminal text considers the Court in action: its initial rulings, cases it has prosecuted and cases where it has decided not to proceed, such as Iraq. It also examines the results of the Review Conference, by which the crime of aggression was added to the jurisdiction of the Court and addresses the political context, such as the warming of the United States to the Court and the increasing recognition of the inevitability of the institution.