This document defines and discusses communism. It begins by defining communism as a stateless, classless, moneyless society with abolished private property. It then discusses major communist thinkers like Marx, Lenin, Stalin, and Mao. Examples of communist states given include the USSR, PRC, Cuba, and potentially North Korea. The document explores arguments for communism based on morality and democracy, and counters common arguments against communism like the idea that humans need incentive and that it only works in theory.