People of the Revolution and the USSR
- Alexander Osipovich Berkman Александр Осипович Беркман Anarchist writer who served 14 years for the Frick assassination attempt, then broke with the Soviet state
- Gustave Hervé Gustave Hervé A French journalist who moved from antimilitarist socialism toward nationalist authoritarian politics.
- Fyodor Ilyich Dan Фёдор Ильич Дан Menshevism's theoretical pillar who stood for democratic socialism against Lenin
- Camille Huysmans Camille Huysmans Secretary of the Second International from 1905 to 1922 who kept its Bureau alive in the war and later became Belgian prime minister
- Julius Osipovich Martov Юлий Осипович Мартов Lenin’s oldest friend and most principled adversary
- Elizabeth Gurley Flynn Elizabeth Flynn "East Side Joan of Arc": from the IWW's Rebel Girl to first woman chair of the CPUSA
- Gavrilo Princip Гаврило Принцип Young Bosnia member who shot dead Archduke Franz Ferdinand and his wife in Sarajevo in 1914