Historian Ilya Evgenyevich Zelenin as shown through his scientific library

The article analyses the scientific biography of Ilya Evgenyevich Zelenin – an outstanding agrarian historian, Doctor of Historical Sciences, Professor, leading researcher of the Institute of Russian History of the Russian Academy of Sciences. The main source used are copies of books presented to Zelenin, devoted to the agrarian and political history of Russia in the twentieth century. On their basis, a conclusion is made about the key elements of the historian's research credo, namely: painstakingness in working out the historiography of the issue, a wide archival search, accuracy of scientific terminology and understanding of the formality of ideological stamps. There are two stages in the author's scientific work, connected with the study of the history of state farm construction in the USSR and the history of agrarian policy of I. V. Stalin and N. S. Khrushchev, in each of which the historian achieved serious successes.