"Karl Marx's theory of alienation describes the estrangement (Ger. Entfremdung) of people from aspects of their Gattungswesen ("species-essence") as a consequence of living in a society of stratified social classes. The alienation from the self is a consequence of being a mechanistic part of a social class, the condition of which estranges a person from their humanity."
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Is this not what identity politics is doing?