Vladimir Lenin was a Russian revolutionary leader who played a crucial role in the 1917 October Revolution. He founded the Bolshevik Party and led the movement that overthrew the Tsarist government, establishing a communist state in Russia. Lenin's ideas were based on Marxism, which advocated for a classless society and the redistribution of wealth. After the revolution, Lenin became the head of the new government and implemented significant changes, including land reforms and the nationalization of industries. His leadership laid the groundwork for the future of the Soviet Union, influencing global politics and inspiring other revolutionary movements around the world.