...exception. While there are informal ways to try to “enforce” international law, for example, through economic
sanctions, a cursory glance at the situation of Crimea, a victim of earlier Russian annexation, reveals that
sanctions are not always capable of changing state behavior. While the crime of aggression (i.e., “crimes against peace”) were prosecuted already in 1945-46 before the International Military Tribunal at Nuremberg, the crime was added late to the International Criminal Court’s Rome Statute, in negotiations held after the Court was already operational and able to prosecute its other...