“Lamenting the vagaries of fate may leave us with a galling sense of helpless frustration, which many escape by transforming the tragedy of the human condition into the specific sins of specific societies. This turns an insoluble problem of cosmic justice into an apparently manageable issue of social justice. Since the sins of human beings are virtually inexhaustible, there is seldom a lack of examples of wrongdoing to which intergroup differences can be attributed, rightly or wrongly. Where the quest for injustice is over-riding, among the things it over-rides are logic and evidence.”