Because society is increasingly secular, it may seem irrelevant to consider the psychology of religion. But the diversity of our multi-ethnic and multi-cultural society in fact makes religion more important to the social sciences than it has ever been before. What are the social consequences of religion? Every day the news is full events that can be blamed on religion, perpetrated by a range of groups from whole societies to individuals. This study of psychology and religion calls into question the social consequences of religion. It should be of use to social psychologists, sociologists and theologians.