The purpose of the article is to analyze the factors of transformation of the Secretariat of the Central Committee of the AUCP(b) into the governing body of the Soviet state. The article has studied the activities of such party and state institutions as the Council of People’s Commissars, the Politburo, the Secretariat of the Central Committee. In this work, an attempt was made to consider the transformation of the Secretariat of the Central Committee of the AUCP(b) headed by I.V. Stalin into a body for developing key decisions. The scientific novelty of the article lies in the fact that it describes the main events of the internal political struggle of various departments of the Soviet state in terms of their priority on the political Olympus at the time of the initial formation of a new one-party state. The article uses the methods of comparison and analysis of archival documents.
 
 A chain of various political events led to the fact that by the beginning of the 1930s, the Secretariat of the Central Committee of the AUCP(b), headed by the Secretary General I.V. Stalin, had begun to hold a privileged position in the political circles of the Soviet state. As a result of the internal political struggle, the interaction between the members and candidates for membership in the Politburo of the Central Committee of the AUCP(b) began to focus on the political position of the Secretariat of the Central Committee of the AUCP(b), which since April 1922 was headed by I.V. Stalin.
 
 In a long and bitter struggle, I.V. Stalin gained a privileged position in political circles and got a stable majority of votes at party congresses. Considering various disputable situations that constantly arose between the opposing factions in the Bolshevik Party, it can be revealed that as a result of the internal political struggle, ideological principles were often pushed into the background. The primary task of one or another group of party leaders was to discredit political opponents and exclude them from the leadership, and then from the Communist Party. I.V. Stalin gained a preponderance of political power due to combining positions in the leadership of the Politburo of the Central Committee of the AUCP(b) and in the leadership of the Secretariat of the Central Committee of the AUCP(b). The realization of this benefit took place through frequent changes within the Party and gaining the overwhelming majority of Stalin supporters’ votes at the plenums of the Central Committee of the Party, meetings of the Political Bureau and congresses of the Bolshevik organization. After I.V. Stalin had been promoted to the position of General Secretary in April 1922, the Central Committee Secretariat headed by him was gradually becoming superior to other political institutions. Stalin’s work in the above-mentioned party organ turns into a decision-making activity, and over time the nature of the documents emanating from him is transformed. As a result of the party infighting of the 1920s, such leaders of the October Revolution as Zinoviev, Kamenev, Trotsky, Bukharin, Rykov, Tomsky, Pyatakov were removed from the political arena. Their names had ceased to appear in the business correspondence of the central party organs. In the leadership of the Bolshevik Party, the factor of the informal system of political decision-making is gradually becoming crucial.
 
 The practical significance of the article is that the results obtained in the study can be used in the preparation of generalizing works on the history of Russia, as well as the history of party-state construction in the USSR. The prospects of the research consist in using the article by teachers and students of educational institutions in the framework of educational courses on the history of the Fatherland. The research materials and the conclusions obtained may be of interest to the heads of state authorities for the development and implementation of personnel policy, the implementation of measures aimed at improving its effectiveness, as well as the strategy of sustainable development of the state.
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