The influential leader of the Bolshevik Revolution in Russia was Vladimir Lenin. He played a pivotal role in the October Revolution of 1917, which resulted in the overthrow of the provisional government that had come to power after the abdication of Tsar Nicholas II in February 1917. Lenin's ideologies were deeply rooted in Marxism, advocating for a proletariat uprising to establish a socialist state. His leadership was instrumental in organizing the Bolsheviks, who would subsequently form the government after their victory. Lenin’s policies and the subsequent civil war shaped the course of Russian history, establishing the Soviet Union and inspiring revolutionary movements worldwide.