What are the similarities between the mass extermination of idolaters in the Old Testament, the burning of witches in the Middle Ages, the extermination of native Americans, the mass killing of the Armenians at the hand of the Turks, the Holo- caust of the European Jews, and the communist eradication of the enemies of the people both in the Soviet Union and Cambodia? Are these to be seen as unique cases, or as the result of a recognizable pattern. The author provides insight into these questions, basing his argument on the latest sources. He maintains that the study of the dynamics that lead to mass destruction may provide a better understanding of the holocaust as a recurrent phenomenon.