The author of the article represents the philosophy's personalist branch as an integral living process of Russian philosophical thought development in the late 19th early 20th centuries, rich with interaction, debate and discussion. The author shows, how the reception of the European personalist tradition was accompanied by a development of the Russian original concepts, a search for the new grounds, justifying the value of an individual, including, but not limiting to the frameworks of "Neo-Leibnizianism" (L. Lopatin, A. Kozlov, S. Alexeev), Neo-Kantianism (S. Hessen), personalist philosophy of education (S. Hessen and V. Zenkovsky), metaphysics of unitotality (Vl. Solovyov, S. Frank, L. Karsavin), G. Fedotov's philosophy of culture and N. Berdyaev's existential personalism. Each of the aforementioned Russian thinkers attempted to solve with their own distinct way the problem of metaphysical "justification" of the value of an individual The author of the article identifies the existential vector of the Russian personalism.