Vladimir Ilyich Ulyanov (main pseudonym Lenin, April 10 (22), 1870, Simbirsk - January 21, 1924, Gorky estate, Moscow province) is a Russian revolutionary, a major theoretician of Marxism, a Soviet political and statesman, creator of the Russian Social Democratic Workers' Party ), the main organizer and leader of the October Revolution of 1917 in Russia, the first chairman of the Council of People's Commissars (Government) of the RSFSR, the creator of the first in the world history of the socialist state