The authors participated in the ICC Review Conference held in Kampala in June 2010, which adopted by consensus a package agreement on the crime of aggression. This contribution presents some impressions from these negotiations. It was rather unexpected that consensus agreement could be reached, and the authors offer some explanations why this was possible. They also analyse the key elements of the agreement. After the international criminalization of aggression has been debated for decades, a decisive step has now been taken towards bringing this crime within the effective jurisdiction of the International Criminal Court.
