Khomenko V. Mykhailo Hrushevsky in the activity of the Ukrainian Socialist-Revolutionary Party: text and context of sources.

The thesis addresses the issue of the complex source study research of the historical sources, which highlight the political activities of M. Hrushevsky in the Ukrainian Socialist-Revolutionary Party. The study establishes that the issue of historian's close collaboration with the Party of SRs remains scarcely researched among the subjects of Hrushevsky study. The scientific novelty of the study consists of the first attempt for the complex research of informational potential of the documents of the Ukrainian Socialist-Revolutionary Party, the Communist (Bolshevik) Party of Ukraine, bodies of the Soviet authority, journalism, epistolary literature and memoirs to identify the role of M. Hrushevsky in the activities of the Ukrainian Party of SRs. The study of the represented source base enables to identify the stages of M. Hrushevsky's collaboration with the party of SRs, follow the evolution of historian's political views abroad, study the reasons for his withdrawal from massive activities in the Ukrainian Party of SRs, and, consequently, the reasons to return to Ukraine.