Answer: Karl Marx
Explanation: Vladimir Lenin, the leader of the Russian Communists, the Bolsheviks and the October Revolution, is a follower of Marxism as the fundamental ideology on which to build a socialist system of rule in the Soviet Union. Many of Marx's ideas, as well as those that Lenin himself personally interpreted to the situation and circumstances in the Soviet Union, together known as Leninism. This is in fact a combination of Marx's and Lenin's ideas, incorporated into the Soviet socialist and economic circumstances.