During the 1920s , Joseph Stalin managed to quietly appoint sycophants into high positions of the Communist Stalin Party . He also manipulated situations to elevate himself . For example , Stalin told Leon Trotsky the wrong day and time for Lenin's funeral and managed to discredit the once popular and dynamic leader . By the 1930s , Stalin continued to centralize his authority through a series of show trials . By the end of the decade , the old Bolshevik leaders of the Revolution , along with any internal challengers , died in the Great Purge . 1936 to 1938 .

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