Davydov A.P. Epistemological Foundations of Socio-Individualism: The Lektorsky-Auzan System. Russian Journal of Philosophical Sciences. 2026;69(3):90-117. (In Russ.) https: ... Davydov A.P. Epistemological Foundations of Socio-Individualism: The Lektorsky-Auzan System. Russian Journal of Philosophical Sciences. 2026;69(3):90-117. (In Russ.) https://doi.org/10.30727/0235-1188-BRREQK. EDN: BRREQKISSN 0235-1188DOI 10.30727/0235-1188-BRREQKÐÈÍÖ: https://www.elibrary.ru/item.asp?id=93457965Posted on site: 21.10.26Òåêñò ñòàòüè íà ñàéòå æóðíàëà URL: https://www.phisci.info/jour/article/view/4076/3672 (äàòà îáðàùåíèÿ 21.10.2026)AbstractThe article introduces the concept of socio-individualism into scholarly discourse by offering an epistemological justification for the author’s model of the “Self – Tri-D/communication – Other” system, here referred to as the Lektorsky–Auzan system. The proposed system brings together Vladislav Lektorsky’s nonclassical epistemology and a socio-individual interpretation of Alexander Auzan’s Tri-D concept, which includes long-term orientation, trust, dialogue, agreement-building capacity, mutual understanding, and related principles. This synthesis is examined as a mechanism of intersubjective cooperation within Victor Polterovich’s theory of social evolution and Ruslan Grinberg’s theory of the social market economy. At the conceptual center of the system is the author’s notion of socio-individualism, understood as a mediating alternative to Sigmund Freud’s ego-individualism and Zbigniew Brzeziński’s egocentrism. At the same time, socio-individualism is presented as a substantive extension of the Enlightenment concept of the individual personality that evolved in European thought between the 17th and 19th centuries.