The 20th century witnessed death and slaughter on an unprecedented scale.
It was the century of the Holocaust and two World Wars; of communist, Nazi, fascist and military dictators who between them killed more than 100 million people.
Scroll down for the leaders themselves, listed in order of the numbers who died as a result of their rule.
1 MAO ZEDONG
China (1949-76) Regime Communist Victims 60 million
2 JOSEPH STALIN
Soviet Union (1929-53) Regime Communist Victims 40 million
3 ADOLF HITLER
Germany (1933-45) Regime Nazi dictatorship Victims 30 million
_________________________ **** ATTENTION! BAD POLITICIANS ARE ELECTED BY GOOD PEOPLE WHO DON'T VOTE! ****