/lit/ - Literature

Any books that talk about the decline of art due to socialists creating the avant garde, modernism/postmodernism, etc. I'll take any books you guys have but I'm interested in books by leftists who talk about this decline if that exists. They are the reason for the popularization of drip painting and chair on the ceiling art. For brutalist architecture that lead to triangle buildings. The sound of car engines and randomly played piano. Obscurantism in film/literature.