Feminism split off from Marxism in the 2nd wave of the 60's/70's when it was decided that class based oppression is a derivative product of patriarchy. Gender took the center stage to class, race, and other forms of marginalization.

The discourse of modern day feminism is best characterized by writers like Michel Foucault. Where discourse is viewed as a postmodern power play. Where the logical validity of the discourse is secondary to the function it serves in power relations.