Totalitarianism is a political system in which a single party or leader exercises complete control over all aspects of society, including the economy, media, and personal lives of citizens.

Adolf Hitler, the leader of Nazi Germany, is responsible for the Holocaust, the systematic extermination of millions of Jews, Roma, and other minority groups.

Joseph Stalin, the leader of the Soviet Union, followed the ideology of Marxism-Leninism, a variant of communism that emphasized the role of a single party and a centrally planned economy.

Mao Zedong, the leader of the People's Republic of China, launched the Great Leap Forward in 1958, an economic campaign aimed at rapidly industrializing the country. However, it resulted in widespread famine and an estimated 20 to 45 million deaths.

Pol Pot and the Khmer Rouge regime in Cambodia followed a radical form of Maoism, which emphasized agrarian revolution and the elimination of perceived class enemies.

Kim Il-sung, the founder and first leader of North Korea, established a totalitarian regime characterized by a personality cult, strict control over information, and the suppression of dissent.

The KGB (Committee for State Security) was the main security agency of the Soviet Union, responsible for counterintelligence, political surveillance, and the suppression of dissent.

Nicolae Ceausescu, the leader of Romania from 1965 to 1989, was known for his lavish lifestyle and megalomaniacal projects, such as the construction of the Palace of the Parliament, the second-largest administrative building in the world.

Pinochetism is a political ideology developed by Augusto Pinochet, the dictator of Chile from 1973 to 1990. It combines elements of authoritarianism, economic liberalism, and nationalism.

Francisco Franco, the dictator of Spain from 1939 to 1975, is known for his brutal military rule and the systematic elimination of political opponents during the Spanish Civil War and its aftermath.

Fascism is a political ideology developed by Benito Mussolini, the founder of Italian Fascism. It emphasizes the importance of the nation, the role of the leader, and the use of force to achieve political goals.

Pol Pot, the leader of the Khmer Rouge regime in Cambodia from 1975 to 1979, is responsible for the Cambodian genocide, in which an estimated 1.7 to 2.2 million people were killed.

Juche is a political ideology developed by Kim Il-sung, the founder of North Korea. It emphasizes the importance of self-reliance, national sovereignty, and the role of the leader.

Jorge Rafael Videla, the leader of the military junta in Argentina from 1976 to 1983, is known for his brutal repression of dissent, which resulted in the disappearance of thousands of people.

Hoxhaism is a political ideology developed by Enver Hoxha, the leader of Albania from 1944 to 1985. It is a variant of Marxism-Leninism that emphasized self-reliance, isolationism, and a strong state.