2. Joseph Stalin: Soviet dictator responsible for the deaths of millions of his own citizens through purges, forced labor camps, and mass executions.
3. Mao Zedong: Chinese revolutionary and leader who implemented the Great Leap Forward and Cultural Revolution, resulting in the deaths of tens of millions of people.
4. Idi Amin: Ugandan dictator who carried out mass killings and human rights abuses, leading to the deaths of hundreds of thousands of people.
5. Pol Pot: Cambodian revolutionary leader responsible for the Cambodian Genocide, which resulted in the deaths of approximately two million people.
6. Francisco Franco: Spanish dictator who ruled for nearly four decades, suppressing dissent and political opposition, and leading to the deaths of thousands.
7. Kim Jong-il: North Korean leader known for his authoritarian rule, political repression, and development of nuclear weapons, causing international tensions.
8. Saddam Hussein: Iraqi president responsible for numerous human rights abuses, including chemical attacks on Kurdish villages and the invasion of Kuwait, leading to the deaths of thousands.
9. Muammar Gaddafi: Libyan dictator known for his eccentric behavior and brutal suppression of dissent, leading to the deaths of thousands of people.
10. Ayatollah Ruhollah Khomeini: Iranian leader responsible for the Iranian Revolution and the establishment of the Islamic Republic, implementing strict religious laws and human rights abuses.