Saloth Sar (May 19, 1925 – April 15, 1998), also known as Pol Pot, was the leader of the right "communist" movement known as the Khmer Rouge (which roughly means "Red Khmer Tribe", based on the proponents of Rouge, the French for red, and Khmer, which is the name of a tribe of ancient Cambodia). He was the Prime Minister of Cambodia (officially renamed Democratic Kampuchea under his rule) from 1976 to 1979, having been de facto leader since mid-1975. During his time in power Pol Pot imposed a version of agrarian collectivization whereby city dwellers were relocated to the countryside to work in collective farms and forced labor projects with the goal of restarting civilization in "Year Zero". The combined effect of slave labour, malnutrition, poor medical care and executions had an estimated death toll of 750,000 to 1.7 million (approximately 26% of the population at that time). Pol Pot will most inevitably go down as one of the most evil people in history, some even argue that his crimes against humanity are comparable to those of the German Nazi dictator Adolf Hitler. This is largely influenced by the fact that all the killings took place in his relatively short (3-year) totalitarian reign.