The problem of group violence is one of the most important issues facing society. Not only is this a crucial topic for our Americanized society, but we are confronted with events that are occurring all over the globe, on all continents, and in all countries. While it is obvious that the daily news pin-points the current `hot' area of conflict, such as the Middle East, the Balkans, and certain regions of Africa, there seems to be no spot on earth that is safe from unreasoned violence. Individuals as well as groups are in danger of being destroyed. How are we to understand these phenomena?