The scientific achievements and social and political activity of Sergiy Shelukhin and its influence on the formation of the concept of independent state of Ukraine in the political and legal thought and state-making practice of the governments and political figures of the UNR, the Directory and public political organizations of Ukrainian political emigration are considered.
The figure of Sergiy Shelukhin in the history of Ukraine has been symbolic for over a century, as his scientific and socio-political activities have largely contributed to the restoration of the sovereign right of the Ukrainian people to an independent state. His conception of Ukrainian statehood, the origin of the name "Ukraine" is today an integral part of the ideological basis for determining priority directions in contemporary Ukrainian politics, in the context of building an independent independent Ukraine, in terms of forming state ideology and national dignity.
In the period of national liberation competitions the main topic of scientific research of the scientist was the origin of the Ukrainian state. It was his intelligence that formed the basis for memoranda, statements, and international treaties of the time.
Shelukhin proved that for the Ukrainian people the right of state sovereignty was restored not only as a result of the renunciation of the tsar and release from the oath of nationality, but also on the contractual grounds of the act of 1654 connection between Ukraine and Russia, since this connection was only the face of the tsar-protector. Thus, on February 28, 1917, the Ukrainian people, on the basis of their historical rights and legal consequences, renounced the tsar and exempted him from the oath by legal means, regained his sovereignty over himself and his Ukrainian statehood.
Scientist in historical monographs "Where does Russia come from:" Names: Rus, Galicia, Ukraine and Little Russia "(1928)," The Theory of Celtic Origin of Kievan Rus from France "(1929)," Ukraine - the Name of Our Land from the Ancient Times "(1936) for the first time explores the problem of the origin of the terms "Rus", "Ukraine", "Russia", "Mala Rus". These studies have played and play an extremely important role in refuting political speculation and falsification regarding the origin of Ukrainians and the emergence of Ukrainian statehood. During his life, S. Shelukhin's works have gained recognition among lawyers, historians, and political figures both in Ukraine and abroad.