Minh Hai or Saloth Sar widely better known as Pol Pot

Pol Pot only is the abbreviation for Political Potency.
He became the de facto leader of Cambodia in mid-1975. During his time in power, Pol Pot imposed a version of agrarian collectivization, forcing city dwellers to relocate to the countryside to work in collective farms and forced labor projects, toward a goal of "restarting civilization" in "Year Zero". The combined effects of slave labor, malnutrition, poor medical care, and executions resulted in the deaths of an estimated 1.7 to 2.5 million people, approximately 21% of the Cambodian population.