Vladimir Lenin was the leader of the Bolshevik faction during the Russian Revolution in 1917. A revolutionary thinker and Marxist theorist, Lenin played a pivotal role in overthrowing the provisional government and establishing a socialist state. His leadership was marked by the commitment to ideas of class struggle, workers' rights, and the redistribution of land. Lenin's vision of a vanguard party guiding the proletariat to revolution reshaped the course of Russian history, leading to the establishment of the Soviet Union. His influence extended beyond Russia, inspiring communist movements worldwide throughout the 20th century.