How did Stalin 's death affect some historians ' views on the Bolshevik victory ?
Lenin , a noted factionalist before the Bolshevik seizure of power , supported the promotion of people he had previously clashed with on important issues to the Politburo ; Trotsky and Lenin had had several years of violent polemics between them , while Grigori Zinoviev and Lev Kamenev both opposed the Central Committee resolution which initiated the October Revolution .