Implementation of the national idea of Ukrainians into life is the development of the Ukrainian independent unite state. It is based on principles of democracy, law, equity, in the distribution of welfare, a proper level of life, the successful development of the Ukrainian culture and national achievements, the adequate reaction on global challenges and threats in the protection of national and state interests, etc. All this was worked out in the ideological and political postulates during the interwar period and tried to implement the state-forming program of the Organization of Ukrainian Nationalists in the years of World War II. If the leading states, war participants listened to these principles concerning the building of the world under the motto: "Freedom to Peoples - Freedom to Man!" it would be possible to avoid millions of human victims, mass destruction, and many years of confrontation of the West and East. Theoretical and practical gains of the Ukrainian nationalists are actual at present-day as well and underline their importance in the development of Ukraine as an independent state. It facilitates the successful struggle against Russia's aggression, becoming the specific protection in saving of the gains of Euro –Atlantic civilization. Progressive countries have to take the Ukrainian factor into consideration in the further progress of humanity in guaranteeing its stability and prosperity.
Keywords: Ukrainian Independent Unite State, Organization of Ukrainian Nationalists, national idea, state forming program, World War II, Ukrainian nationalists, liberation struggle, totalitarian regime.