The following is a list of the worst genocides that have occured in the 20th century.
Its important to note that Atheist based ideologies have had more than their fair share of genocide related crime - an obvious phenomenon downplayed by Richard Dawkins and the 'God Delusion' groupie crowd.
Those in Red have been driven by Marxist related ideological regimes (Atheist Focused).
Those in Blue have been driven by Fascist related ideological regimes (Atheist Focused).
Those in Green have been inspired carried out by Muslim Leaders against predominantly Muslim Populations.
Those in purple have been carried out by Muslim leaders against predominantly non-Muslim populations.
Those in grey have been carried out by Muslim leaders against mainly Muslim but also non-Muslim populations.
Those in light blue have been carried out by Western Governments.
Those in Black were carried out within by African dictatorships or during the course of African Civil Wars.
Other attrocities are shown in this brownish-colour mixture.
Mao Ze-Dong (China, 1958-61 and 1966-69)
49,000,000 ("great leap forward" and "cultural revolution")
Jozef Stalin (USSR, 1934-39)
13,000,000 (the purges)
Adolf Hitler (Germany, 1939-1945)
12,000,000 (concentration camps and civilians WWII)
Hideki Tojo (Japan, 1941-44)
5,000,000 (civilians WWII)
Pol Pot (Cambodia, 1975-79)
Kim Il Sung (North Korea, 1948-94)
1.6 million (purges and concentration camps)
Menghistu (Ethiopia, 1975-78)
Ismail Enver (Turkey, 1915)
Yakubu Gowon (Biafra, 1967-1970)
Leonid Brezhnev (Afghanistan, 1979-1982)
Jean Kambanda (Rwanda, 1994)
Suharto (East Timor, West Papua, Communists, 1966-98)
Saddam Hussein (Iran 1980-1990 and Kurdistan 1987-88)
Yahya Khan (Pakistan, 1971) vs Bangladesh
Fumimaro Konoe (Japan, 1937-39)
500,000? (Chinese civilians)
Savimbi (Angola, 1975-2002)
Mullah Omar - Taliban (Afghanistan, 1986-2001)
Idi Amin (Uganda, 1969-1979)
Yahya Khan (Bangladesh, 1970-1971)
Benito Mussolini (Ethiopia, 1936; Yugoslavia, WWII)
Mobutu Sese Seko (Zaire, 1965-97)
Charles Taylor (Liberia, 1989-1996)
Foday Sankoh (Sierra Leone, 1991-2000)
Slobodan Milosevic (Yugoslavia, 1992-96)
Michel Micombero (Burundi, 1972)
Hassan Turabi (Sudan, 1989-1999)
Jean-Bedel Bokassa (Centrafrica, 1966-79)
Richard Nixon (Vietnam, 1969-1974)
70,000 (vietnamese civilians)
Efrain Rios Montt (Guatemala, 1982-83)
Papa Doc Duvalier (Haiti, 1957-71)
Hissene Habre (Chad, 1982-1990)
40,000 (Although Hissene was a Muslim leader and killed many Muslims this was felt to be the most appropriate category for him).
Chiang Kai-shek (Taiwan, 1947)
30,000 (popular uprising)
Vladimir Ilich Lenin (USSR, 1917-20)
30,000 (dissidents executed)
Francisco Franco (Spain)
30,000 (dissidents executed after the civil war)
Fidel Castro (Cuba, 1959-1999)
Lyndon Johnson (Vietnam, 1963-1968)
Hafez Al-Assad (Syria, 1980-2000)
Khomeini (Iran, 1979-89)
Robert Mugabe (Zimbabwe, 1982-87, Ndebele minority)
Rafael Videla (Argentina, 1976-83)
Guy Mollet (France, 1956-1957)
10,000 (war in Algeria)
Paul Koroma (Sierra Leone, 1997)
Osama Bin Laden (worldwide, 1993-2001)
Augusto Pinochet (Chile, 1973)
Al Zarqawi (Iraq, 2004-06)
Source: For all the numbers and stats visit: http://www.scaruffi.com/politics/dictat.html