Near the end of 1925, the Communist Party of the Soviet Union was rocked at its foundations by one of the most intense and profound ideological controversies in its history. The ruling “Troika“ of Zinov'ev, Kamenev and Stalin was torn asunder over a series of crucial problems which largely turned on the question of “socialism in one country,” formulated by Stalin in the latter part of 1924. To its opponents, the theory smacked of “national narrowness” and a fatal revision of Marxist orthodoxy.
It was G. E. Zinov'ev, gifted agitator, long-time friend of Lenin, and member of the powerful Politburo of the Party, who assumed the initiative in attacking Stalin's theory and splitting the Party wide open. Having organized the “New Opposition” in October, 1925, he officially opened the attack at the Fourteenth Party Congress in December.