Georgi Valentinovich Plekhanov was a Russian revolutionary, philosopher and Marxist theoretician. He was a founder of the social-democratic movement in Russia and was one of the first Russians to identify himself as Marxist. Facing political persecution, Plekhanov emigrated to Switzerland in 1880, where he continued in his political activity attempting to overthrow the Tsarist regime in Russia. Plekhanov is known as the "father of Russian Marxism".

The Bolsheviks, led by Vladimir Lenin, were a far-left faction of the Marxist Russian Social Democratic Labour Party (RSDLP) which split with the Mensheviks at the Second Party Congress in 1903. The Bolshevik party seized power in Russia in the October Revolution of 1917, and was later renamed the Communist Party of the Soviet Union. Their ideology and practices, based on Leninist and later Marxist–Leninist principles, are known as Bolshevism.