The subject of the article is a mass psychology of B.P. Vysheslavtsev. This is a socio-philosophical conception, which created by Vysheslavtsev through the synthesizing of German classical philosophy, neo-Kantianism, Russian religious philosophy and analytical psychology. He developed the mass psychology in close collaboration with C.G. Jung by his direct order. The mass psychology, despite the heterogeneity of its foundations, became an organic continuation of analytical psychology. Moreover, there is reason to suppose that Vysheslavtsev's socio-philosophical and religious ideas influenced all of Jung’s later work. The main method used was a comparative analysis of the ideas of Vysheslavtsev and Jung, as well as a critical interpretation of the original sources, including unpublished archival materials — letters and manuscripts. The novelty lies in the fact that previously the mass psychology of Vysheslavtsev eluded the attention of researchers. This is primarily due to the inaccessibility of sources on this issue, since some of them are either not published and stored in archives, including the Bakhmeteff Archive (Columbia University in the City of New York) and C.G. Jung Papers Collection (ETH Zurich University Archive), or was published in rare foreign journals and not translated into Russian. At the same time, without these sources it is difficult to understand not only the evolution of Vysheslavtsev’s views, but also the logic and reasons for the development of Jung’s ideas from the 1940s to his death. Thus, this article is intended to partially replenish these gaps in the history of Russian and European philosophy and psychology.
The role of mass psychology of B. P. Vysheslavtsev in development of analytical psychology