Moral questions about warfare are often extremely troubling because the stakes in war are mon strously high and because such queries provoke clashes between widely held moral beliefs-espe cially these two: that killing people is wrong and that killing in self-defense may sometimes be right. Some veteran soldiers say that the cauldron of war tests the physical and moral mettle of the warrior more severely than any other experience in life. Likewise, weighing the morality of war making can try our moral sensibilities as few other issues can. Part of the role of morality is to help us make sense of, and contend with, the bad parts of life, the evil in the world. And few things can be a greater source of evil-massive, horrific moral evil-than war..