The men who are most closely connected with the invention or creation of communism are Karl Marx and Vladimir Lenin. This is why communism is often called Marxism-Leninism.
Marx was the theorist who came up with the idea of communism. He envisioned a historical process in which class conflict would inevitably lead to the victory of the workers over the owners. But Marx did not act on his vision. The man who had the most to do with creating a country based on Marx's vision was Lenin. Lenin created a communist state in what became the Soviet Union.
An ancient Greek author, Plutarch, wrote a biography of Lycurgus, the legendary author of the Spartan Constitution that turned Sparta into a commune, which took extreme measures to make everybody equal.