Communism was a political and economic theory advocated most famously by Karl Marx. Communism argues for a socialist revolution toward creating a communal, classless state. Marx was Jewish, though his family had converted to Protestantism. One of Marx's early works, "On the Jewish Question," which expresses some anti-Semitic ideas, also addresses an issue important to the Zionists, namely political emancipation. It was a Jew and an early Zionist, Moses Hess, who introduced Marx to socialism in the first place.