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Gregory Zinoviev was a leading member of the Bolshevik Party. Zinoviev was a loyal follower of Vladimir Lenin but after Lenin’s death and the rise of Joseph Stalin to power, his days were numbered by a man who could not tolerate anyone appearing to be the merest of rivals to him and Zinoviev was seen by Stalin as a rival.
Grigory Zinoviev. Grigory Yevseyevich Zinoviev [a] (born Ovsei-Gershon Aronovich Radomyslsky [b], 23 September [O.S. 11 September] 1883 – 25 August 1936) was a Russian revolutionary and politician.
In October 1927, Grigory Zinoviev and Leon Trotsky were expelled from the Central Committee and forced into exile. In 1928, Stalin introduced the First Five-Year Plan for building a socialist economy. In place of the internationalism expressed by Lenin throughout the Revolution, it aimed to build Socialism in One Country.