Lev Borisovich Kamenev (1883  1936) Bolshevik revolutionary and a prominent Soviet politician. He was one of the seven members of the first Politburo, founded in 1917 to manage the Bolshevik Revolution: Kamenev was the brother-in-law of Leon Trotsky. He served briefly as the equivalent of the first head of state of Soviet Russia in 1917, and from 1923-24 as acting Premier in the last year of Vladimir Lenin's life. Joseph Stalin viewed him as a cause of discontent and opposition to his own leadership. Kamenev was executed on 25 August 1936 after a show trial during the period of the Great Purges.