The Critical Theory of Marxism is not just about class anymore.
>>The Critical Theory of Marxism is not just about class anymore.<<
Marxism never really took off in the US. Unlike in Europe, it was very possible for a smart and hard working guy born to working class parents to ascend to middle class or upper middle class. This means that the people Communists would like to recruit are instead busy improving their own status.
Marxism depends on envy, which means they must use immutable characteristics like race and sex and LGBT orientation to create anger and envy and a sense of being oppressed.