...with an underlying morality much the same as ours. But if that is true, it seems that an underlying morality has no effect at all on actual behaviour. ).How, then, is an essentially correct theory of good and evil corrupted? If one starts from a sound moral basis, how can things go so disastrously wrong?' He points out the relevance of this question to the twentieth century, 'in which the worst atrocities have often been committed by...