Berdyaev Nikolai Alexandrovich (1874-1948) - a Russian outstanding religious philosopher who moved from Marxism to the philosophy of personality and freedom in the spirit of religious existentialism, exploring human life. In the work "Russian Idea," the philosopher explores "Russianness," the mysterious substance of the "Russian soul." Berdyaev's reflections cover historical events from the Baptism of Russia to the October Revolution, inextricably linked with the activities of Archpriest Avvakum, Peter I, Chaadaev, Dostoevsky, Solovyov and Lenin. In the work "The Origins and Meaning of Russian Communism," N.A. Berdyaev sets out his original understanding of the ideological origins and social conditioning of the Russian revolution, its significance in the historical fate of Russia.