Communists are individuals who support the political and economic ideology of communism, which advocates for a classless society where all property is publicly owned. In this system, the means of production, such as factories and farms, are controlled by the community or the state, aiming to eliminate private ownership and reduce economic inequality. The idea of communism was popularized by Karl Marx and Friedrich Engels in the 19th century, particularly through their work, the Communist Manifesto. Various countries, including the former Soviet Union and China, have implemented communist systems, though the outcomes and interpretations of communism have varied significantly across different contexts.