USSR: 20 million deaths

China: 65 million deaths

Vietnam: 1 million deaths

North Korea: 2 million deaths

Cambodia: 2 million deaths

Eastern Europe: 1 million deaths

Latin America: 150,000 deaths

Africa: 1.7 million deaths

Afghanistan: 1.5 million deaths

Communist movements or parties not in power: about 10,000 deaths

Nearly 100 million deaths. Not casualties of war, but civilian slaughter. Deaths in gulags and concentration camps. Deaths from a bullet to the head. Most of all, deaths by starvation - the result either of planned famines, meted out as punishment to internal foes (as in Stalin's USSR), or unintended consequences of central policy.