Mukha D. Socail-political, public activity, scientific legacy of P.A.Khrystjuk (1890-1914).

The dissertation is complex research of social-political, public activity and scientific legacy of Pavlo Onykyjovych Khrystjuk - one of the leading public figure in the Ukrainian national liberation movement. Due to the wide using of archives, published sources, memoirs, resources the author analyses the main stages of P.Khrystjuk's life, discovers the formation of his political opinions and practical contribution to the state process of defining the independent, sovereign and unified state. The author discloses that the scientific work "Notes and materials for the history of the Ukrainian revolution of 1917 - 1920. Ukrainian revolution. Exploration and materials" is different from the general historiography of its fundamental analysis of the national liberation struggle of Ukrainian people in the first quarter of the twentieth century.