Grigory Zinoviev

Grigory Yevseyevich Zinoviev (born Ovsei-Gershen Aronovich Radomyshelsky; 23 September [O.S. 11 September] 1883 – 25 August 1936) was a Russian revolutionary and Soviet politician. A prominent Old Bolshevik, Zinoviev was a close associate of Vladimir Lenin prior to 1917 and a leading figure in the early Soviet government. He served as chairman of the Communist International (Comintern) from 1919 to 1926.

Zinoviev joined the Russian Social Democratic Labour Party in 1901 and sided with Vladimir Lenin's Bolsheviks in the party's 1903 split, forging a close political relationship with him. After participating in the failed Revolution of 1905, he served as Lenin's aide-de-camp in Europe. Zinoviev returned to Russia after the February Revolution of 1917 and joined with Lev Kamenev in opposing Lenin's "April Theses" and later the armed seizure of power which became the October Revolution. He lost the trust of Lenin, who began relying on Leon Trotsky. Zinoviev was nevertheless elected chairman of the Petrograd Soviet and the Comintern, and a full member of the Politburo in 1921.