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Russian revolutionaries and leaders Joseph Stalin (1878 - 1953), Vladimir Ilyich Lenin (1870 - 1924), and Mikhail Ivanovich Kalinin (1875 - 1946) at the 8th Congress of the Russian Communist Party in Moscow, 23rd March 1919. (Photo by FPG/Archive Photos/Getty Images)

Russian revolutionaries and leaders Joseph Stalin (1878 - 1953), Vladimir Ilyich Lenin (1870 - 1924), and Mikhail Ivanovich Kalinin (1875 - 1946) at the 8th Congress of the Russian Communist Party in Moscow, 23rd March 1919. (Photo by FPG/Archive Photos/Getty Images)