Mark Natanson
Mark Andreyevich Natanson July 1919 was a RussianJewish revolutionary and one of the founders of the Circle of Tchaikovsky, Land and Liberty, and the SocialistRevolutionary Party. In 1917, he was a leader of the Left SocialistRevolutionaries, supporting the Bolsheviks in the October Revolution. He was the uncle of Alexander Berkman.
Mark Natanson was born in 1850 in venionys, Lithuania to a wealthy Jewish family. He studied in St Petersburg at the Medical and Surgical Academy and at the Institute of Agriculture . During this time, he became involved in radical student politics. He opposed the nihilistic tendency of Sergei Nechaev. Natanson participated in founding the vand the populist organisation Land and Liberty and helped organise some of the first socialist groups among the small industrial working class in Western Russia. He also took part in demonstrations, notably the Kazan demonstration in St Petersburg in 1876. After Land and Liberty split, Natanson joined The Peoples Will . That group favoured agitation among urban workers and intellectuals over propaganda among the peasants . Narodnaya Volya also endorsed political terrorism as a tactic and in 1881 assassinated Tsar Aleksandr II.
Source: Wikipedia