The monograph is devoted to the almost unexplored religious and philosophical direction of public thought in Russia at the end of the 19th - beginning of the 20th centuries. For the first time in Soviet literature, the ideas of B.C. Solovyov, S.N. and B.N. Trubetskoy, S.N. Bulgakova, V.F. Erna, L.N. Karsavina, P.A. Florensky are realized as a single, holistic worldview, the opinion is justified that all these Russian thinkers were, in essence, representatives of the same school. Much of the thoroughly forgotten or previously unreleased is introduced into scientific circulation.