This paper deals with the ontological foundations of the Soviet interpretation of dialectical materialism as exemplified by one of its “founding fathers,” Abram Deborin, in his works of the late 1920s. It has been claimed that the “ontologizing” tendency in Soviet philosophy is due to the influence of Friedrich Engels and his ideas pertaining to the dialectics of nature. However, a more plausible interpretation is that the ontologism of Soviet philosophy is connected with the rejection of the Kantian Copernican turn (...) in philosophy and the idea of the primacy of gnoseology it implies. In this article, I argue in favor of the latter thesis. Ontologism, i.e., the tendency to give priority in philosophy to questions concerning Being, and anti-Kantianism are but two sides of the same coin. (shrink)