The leader of the Bolshevik faction during the Russian Revolution of 1917 was Vladimir Lenin. A key figure in Marxist theory, Lenin played a significant role in the groundwork for the Bolshevik cause, advocating for a proletarian revolution. His leadership during the October Revolution facilitated the Bolsheviks' seizure of power, leading to the establishment of a communist government. Lenin's ideas on revolution and governance influenced not only Russia but also inspired communist movements worldwide. His policies and governance strategies laid the foundation for the future Soviet state.