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The book is dedicated to Mazepa Isaak Prokhorovych (16. 08. 1884 & 18. 03. 1952) - a public, political and state figure. From 1920 he lived in exile in Lviv, and was the editor of the journal Socialist Thought. From 1923, he lived in exile in Czechoslovakia, a professor at the Ukrainian Economic Academy in Poděbrady and the Ukrainian Sociological Institute in Prague. He was a member of the leadership of the Foreign Group of the Ukrainian Social Democratic Workers' Party and a member of the Executive Committee of the Socialist Workers' International. From 1945 he lived in Austria and Germany. From October 1946 he was a professor at the Ukrainian Technical and Economic Institute in Munich (Bavaria). Co-founder of the Ukrainian National Council in exile (1948), head of the UPR government in exile. Founder of the Ukrainian Socialist Party (1950).