> War is essentially an evil thing. Its consequences are not confined to the belligerent states alone, but affect the whole world. To initiate a war of aggression, therefore, is not only an international crime; it is the supreme international crime differing only from other war crimes in that it contains within itself the accumulated evil of the whole.

from the judgement of the International Military Tribunal for Germany, http://avalon.law.yale.edu/imt/judnazi.asp#common