The recent outbreak of ethnonationalist crimes in the Middle East, Rwanda, Bosnia, Chechnya, and Northern Ireland has once again brought this particular type of violence to the fore. This timely monograph examines the social-psychological and anthropological roots of this spreading societal evil. Dusan Kecmanovic draws upon his own experiences of conflict in Bosnia to explain how the potential for ethnonationalism is realized under particular social and political circumstances. He integrates various concepts of group dynamics to reveal ethnonationalism's existence as a perennial tendency and principle in a new historical, social, and ideological guise. The book includes extensive end-notes, original schemes and figures, and an expansive reference list.