"Every time a dictator dies, or an atrocity is perpetrated, or details of the torture endured by those who lived through one regime or another escapes to the outside world, invariably the cry goes up that this must never be allowed to happen again. The unsavory fact is, however, that it does happen again, over and over, from one continent to another."

-Shelley Klein, author of The Most Evil Dictators in History

1 Adolf Hitler (Germany)

Born: 20 April 1889 (Braunau am Inn, Austria-Hungary)
Died: 30 April 1945 (Berlin, Germany)
Nationality: Austrian citizen until 7 April 1925, Citizen of Brunswick after 25 February 1932, Citizen of Germany after 1934
Parents: Alois Hitler (father), Klara Pölzl (mother)
Spouse: Eva Braun
Occupation: Politician
Political party: National Socialist German Workers' Party (1921–45)
Battles/wars: World War I (as soldier), World War II

Where are the rest??

2. Joseph Stalin (USSR)

Patronym: Vissarionovich
Family name: Jugashvili
Born: Ioseb Besarionis Dze Jugashvili
Born: 18 December 1878, Gori, Tiflis Governorate, Russian Empire
Died: 5 March 1953 (aged 74), Kuntsevo Dacha, Kuntsevo, Russian SFSR, Soviet Union
Nationality: Georgian
Parents: Besarion Jughashvili, Ketevan Geladze
Spouse (s): Ekaterina Svanidze (1906–1907), Nadezhda Alliluyeva (1919–1932)
Children: Yakov Dzhugashvili, Vasily Dzhugashvili, Svetlana Alliluyeva
Occupation: Politician
Political party: Communist Party of the Soviet Union
Battles/wars: World War I, Russian Civil War, Polish–Soviet War, World War II

3. Mao Zedong (China)

Born: December 26, 1893, Shaoshan, China
Died: September 9, 1976, Beijing, China
Nationality: People's Republic of China
Spouse (s): Luo Yixiu (1907–1910), Yang Kaihui (1920–1930), He Zizhen (1930–1937), Jiang Qing (1939–1976)
Children: 10
Occupation: Revolutionary, statesman
Political party: Communist Party of China

4. Sheikh Hasina (Bangladesh)

Born: September 28, 1947 (age 67)
Parents: Sheikh Fazilatunnesa Mujib, Sheikh Mujibur Rahman
Spouse: M. A. Wazed Miah (m. 1967–2009)
Children: Sajeeb Wazed, Saima Wazed Hossain Putul
Siblings: Sheikh Kamal
Education: University of Dhaka, Eden Mohila College, Boston University
Occupation: Politician
Political party: Bangladesh Awami League

5. Kim Jong-il (North Korea)

Born: Yuri Irsenovich Kim
Born: 16 February 1941, Vyatskoye, Khabarovsk Krai, Russia
Died: December 17, 2011, Pyongyang, North Korea
Spouse (s): Kim Young-sook (1974–2011)
Children: Kim Jong-un, Kim Jong-nam, Kim Yo-jong, Kim Jong-chul, Kim Sul-song
Occupation: Politician
Political party: Wo, Russia
Died: December 17, 2011, Pyongyang, North Korea
Spouse (s): Kim Young-sook (1974–2011)
Children: Kim Jong-un, Kim Jong-nam, Kim Yo-jong, Kim Jong-chul, Kim Sul-song
Occupation: Politician
Political party: Workers' Party of Korea

6. Vlad III the Impaler (Wallachia)

Other names: Vlad III Dracula, (Vlad) Drăculea, (Vlad) Dracula
Romanian name: Vlad Țepeș
Born: November or December 1431, Segesvár, Kingdom of Hungary
Died: December 1476 or January 1477, exact date unknown (aged 44-45), Wallachia (exact location unknown)
Parents: Vlad II Dracul, Cneajna of Moldavia (presumed)
Wives: Transylvanian noblewoman Ilona Szilágyi
Reign: 1448, 1456–1462, 1476
House: House of Drăculești (branch of the House of Basarab)

7. King Herod the Great (Israel)

Born: 74/73 BCE, Edom
Died: 4 BC, Jericho
Parents: Cypros, Antipater the Idumaean
Wives: Doris, Mariamne I, Mariamne II, Malthace, Cleopatra of Jerusalem
Children: Herod Antipas, Herod Archelaus, Philip the Tetrarch, Antipater II, Herod II, Aristobulus IV, Salome, Alexander, son of Herod, Salampsio, Phasael, Olympias, Herod, Cypros, Roxanne
Occupation: King of Judea
Religion: Second Temple Judaism
Reign: 37–4 BCE

Abacha and Buhari should make this list