Mark Natanson | |
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| Born | Mark Andreyevich Natanson 6 January 1851 |
| Died | 29 July 1919 (aged 68) |
| Occupation(s) | Revolutionary, political activist |
| Family | Alexander Berkman (nephew) |
Mark Andreyevich Natanson (Russian: Марк Андре́евич Натансо́н; party name: Bobrov; 25 December 1850 (N.S. 6 January 1851) – 29 July 1919) was a Russian revolutionary who was one of the founders of the Circle of Tchaikovsky, Land and Liberty and the Socialist-Revolutionary Party. In 1917, he was a leader of the Left Socialist-Revolutionaries, which supported the Bolsheviks during the October Revolution. He was the uncle of Alexander Berkman.