Communism and capitalism are opposing economic systems that emerged as dominant ideologies during the Cold War. Communism is defined as a classless, stateless social organization based on common ownership, while capitalism is based on mostly private ownership and investment for profit. Key figures that influenced these systems include Adam Smith, who advocated for natural liberty and laissez-faire economics, and Karl Marx, who predicted that capitalism would be overthrown through proletariat revolution and communism would emerge. The Cold War was characterized by tensions between capitalist United States and communist Soviet Union, and nearly escalated to nuclear war during the Cuban Missile Crisis. Criticisms of communism include that it led to over 50 million deaths and failed to account for human