15 January] 1837 – 26 November 1905) was a Ukrainian-Russian philosopher and sociologist of the poitivist and later Empirio-Criticist school as well as an ethnographer, folklorist, literary historian and public figure.

He lectured at the Higher Russian School of Public Sciences and organized the Society for the Study of Ethnography and History of Ukraine in St.

[2] In his early works, Lesevich was an orthodox followee of positivists, primarily Auguste Comte and Pyotr Lavrov, as well as the materialist humanism of Ludwig Feuerbach.

He wrote against the “remnants” of theology and metaphysics and believed that the victory of “positive” and “scientific” stage of the development of thought was an inevitability.

The latter meant the actualization of the ideas of neo-Kantian criticism of Alois Riehl, the subjective idealism of George Berkeley and David Hume, and the development of a theory of knowledge based on empirio-criticism of Richard Avenarius.