On Catharine MacKinnon’s view, feminism aspires to be a theory of the kind that Marxism is: a theory of the organisation of the social world as sex hierarchy, just as Marxism is a theory of the organisation of the social world as class hierarchy. In 1982, MacKinnon observed that feminism was not yet such a theory, and set out to make it one. She did this by developing a theory of sexuality as to feminism what work is to Marxism. If one shares MacKinnon’s view that feminism aspires to be a theory of the kind that Marxism is, then one sees MacKinnon as, with her theory of sexuality, creating, albeit in beginning form, a feminist theory. One thus considers MacKinnon’s theory of sexuality a definitive moment in the history of feminist theory. Y...