Question: Which ideologies helped formalize the ideas of the third member of the triumvirate, along side Zinoviev and Kamenev,. 
Sentence (from "Joseph Stalin"): Governing the Soviet Union as its dictator from the mid-1920s until his death in 1953, he served as General Secretary of the Central Committee of the Communist Party of the Soviet Union from 1922 to 1952 and as Premier of the Soviet Union from 1941 to 1953.
Relevant evidence: No