Drawing parallels between tribal behavior and international relations to demonstrate that societies are not inherently aggressive but are led into conflict when pride or in-group pressures push people to fight, this profound look at the chilling reality of cold war and its arsenal of nuclear destruction offers valuable new insights into how prejudices and stereotypes contribute to what may seem like an inexorable drift to war. Yet the authors conclude that war is not inevitable, as they offer suggestions for an end to the arms race in the nuclear age. Based on original research, this is a long overdue contribution to the study of war and peace in our time and a text for newly emerging courses on the subject.