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Notable dictators in world history have included Adolph Hitler, Chancellor of Germany from 1933-45, Josef Stalin, General Secretary of the Communist Party of the Soviet Union from 1928-53, Pol Pot, head of the Khmer Rouge and ruler of Cambodia (or Kampuchea) from 1963-98, Mao Tzedong, ruler of China from 1945-76, and Islam Karimov, current ruler of Uzbekistan since 1991, and Muamar Ghaddafi, long-time ruler of Libya.  

Notable dictators in world history have included Adolph Hitler, Chancellor of Germany from 1933-45, Josef Stalin, General Secretary of the Communist Party of the Soviet Union from 1928-53, Pol Pot, head of the Khmer Rouge and ruler of Cambodia (or Kampuchea) from 1963-98, Mao Tzedong, ruler of China from 1945-76, and Islam Karimov, current ruler of Uzbekistan since 1991, and Muamar Ghaddafi, long-time ruler of Libya.  

Some rulers take on the traits of a dictator but do not achieve complete totalitarian rule. Examples include Agusto Pinochet of Chile, George W. Bush of the U.S.A and Fidel Castro of Cuba.

Some rulers take on the traits of a dictator but do not achieve complete totalitarian rule. Examples include Agusto Pinochet of Chile, and Fidel Castro of Cuba.