What is Cultural Marxism? William S. Lind Cultural Marxism is a branch of western Marxism, different from the Marxism-Leninism of the old Soviet Union. It is commonly known as “multiculturalism” or, less formally, Political Correctness. From its beginning, the promoters of cultural Marxism have known they could be more effective if they concealed the Marxist nature of their work, hence the use of terms such as “multiculturalism.”