There is a strong Western tradition of opposing angry, hostile, or antagonistic reactions to wrongdoing. In the twentieth century, leaders like Mahatma Gandhi and Dr. Martin Luther King, Jr. counseled responding to wrongdoing with forgiveness and love rather than anger, hate, or vindictiveness.This ideal has taken on an exalted status in Western culture. Gandhi and King are widely regarded as moral saints. And yet sometimes antagonism seems deeply appropriate. Consider a very serious wrong: suppose, for instance, that a driver viciously and deliberately runs down my small child on the sidewalk. I ought to be resentful and angry at someone who does such a thing. It is troubling if I am not.In light of such worries, some philosophers have def...