Feliks Koneczny's (1862-1949) ideas in history and philosophy of history are well-known in today's world. Yet there hasn't been even one thorough biography of that outstanding scholar based on an in-depth archival query.The author's research provided the answer to the hitherto unexplained, mysteries concerning Feliks Koneczny. After graduating from the Faculty of Philosophy at the Jagiellonian University in Cracow he began to work as an office senior lecturer at the Academy of Arts and Sciences; since 1897, he worked at the Jagiellonian Library. In 1919 he became an assistant professor and in 1920 a professor of the Stefan Batory University in Vilnius. His interests moved from purely historical research to the philosophy of history, religion and philosophy. His pioneering works dealing with the history of Russia as well as his theory the evolution of civilizations are among his greatest achievements. Anton Hilckman, Arnold Toynbee and Samuel Huntington widely draw upon Koneczny's works and achievements. His written scholarly output encompassed 26 volumes, each of them being 300 to 400 pages long, not to mention more than 300 articles, brochures and reprints. In fact not many Polish historians can prode themselves on such an enormous scope of research, which included anthropology, sociology, philosophy, theology, ethnology, psychology, economics, history and law. This list, impressive as it may be, fails to do justice to the moral and personal dimension of his work. This loner by choice was the creator of Polish philosophy of history, a major Catholic thinker, a university professor and humanist in the most significant sense of the word.