investigating the reasons for the decline of avant-garde art in Russia and its relationship with the Hardening of ideology In the period before the October Revolution until the end of Stalin's rule.

Experimental and avant-garde art did a lot of service to the Russian Revolution, and the artists of that time were mostly considered revolutionaries, but after the revolution, strange things happened and many artists were considered traitors.As we all know, Marx's intellectual foundations were influenced by Hegel's philosophy, and for this reason he sided with Hegel's committed art in the face of the famous dichotomy of independent art and committed art (Kant-Hegel). Theoretically, this bias means rejecting the autonomy and independence of the artist and rejecting the individual subject's individuality in the field of creating the work, but in practice we will see that due to the humanistic nature of communist utopian claims (such as equality - classless society) Inevitably, humanist aspects are also found in Marx's earlier views. This article seeks to trace the roots of the success and growth of avant-garde art in Marx's earlier views and to show as much as possible how the decline of these teachings and the rigidity of the ideological system caused the decline of modernist art in the post-Marx period to the height of Stalinist ideology. They provided the sphere of leftist thought.