Profile of Pol Pot, who rose to be leader of Cambodia's Khmer Rouge and self-appointed prime minister in a social experiment that became a grotesque example of communist reform in action involving the depopulation of the cities and enforced labour in food production. Discarding his early training as a Buddhist monk, he ruthlessly pursued his plan, showing no respect for the sanctity of human life, and tortured and killed as many as two million dissidents in a reign of terror from 1975 to 1979