Symposium: The Codification of the Crime of Aggression

• Kreß, Claus

Abstract

In the course of recent years, the Special Working Group on the Crime of Aggression has prepared the ground for a final political decision to be made in Kampala in 2010. This symposium will hopefully constitute a useful contribution to the comprehensive debate that is necessary in order to enable the political leaders to make their choice in an informed manner. This article argues that there are no compelling policy reasons against allowing the International Criminal Court to exercise its jurisdiction over the crime of aggression, which already forms part of customary international law. In particular, there is no compelling reason for not reflecting the co-existence of the jus contra bellum and the jus in bello on the secondary level of international criminal law and international criminal justice. While the definition contained in the Draft amendments to the Rome Statute of the International Criminal Court on the Crime of Aggression is imperfect in some respects, it constitutes a reasonable and workable compromise which, on a somewhat closer inspection, proves to be much more determinate than it may seem at first glance. In light of this achievement and the unlikelihood of the emergence of a magic formula for a perfect definition, this article takes the view that the window of opportunity which will be open in Kampala should be used because otherwise it may be closed for a very long time. The 2010 Review Conference should therefore mark the historic occasion on which state leaders eventually form the collective will to allow for the prosecution of the most serious violations of the jus contra bellum and hereby to complete the new system of permanent international criminal justice.