Quote from : Bi: Notes for a Bisexual Revolution Book

If the goal of feminism is to end patriarchy and gender-based oppression, then transgender politics supplies us one of the most important perspectives from which to view - and challenge - binary gender and gender-based oppression. As mentioned in previous chapters, if no clear distinction exists between "male" and "female," it becomes impossible to oppress people according to their gender. If we have no sole criterion for determining who is "man" and who is "woman," we can't know whose role it is to be oppressor, and whose to be oppressed.