The purpose of the study is to reconstruct the Polish-Ukrainian discourse of editorial and journalistic works of Yulian Tarnovich. The methodology of the study is to combine general scientific (abstracting, analysis and synthesis, induction, deduction, classification, typology, generalization), interdisciplinary (comparative, critical, systematic, structural and system approach), and specially historical (comparative-historical, problem-chronological, periodization, retrospective) methods. In the course of the study, it was discovered that Y. Tarnovich paid particular attention to the most problematic period of the Polish-Ukrainian relations – 1920–1940s, marked by attempts to denationalize the Lemkos in the Second Commonwealth, an international confrontation during the period of the German-Soviet War, by forceful deportation of the Lemkos from their native land in 1945–1947. It is stated that the publicist covered this complex subject not from a narrow national position, but from the standpoint of universal values. By providing numerous examples Y. Tarnovich showed that when the stronger ignores ordinary human rights, he becomes weaker in the long run, he destroys himself, because barbarism in relation to the neighbor generates the energy of self-destruction. The conclusions about the saturation of Y. Tarnovych's creative heritage with problems of Polish-Ukrainian relations have been made. It has been concluded that the analysis showed the fruitfulness of the further appeal to the international discourse of the creative heritage of the outstanding Lemko figure that should become a key component of his intellectual biography.