 Catharine MacKinnon develops her theory of gender as a theory of sexuality. Very roughly: the social meaning of sex (gender) is created by sexual objectification of women whereby women are viewed and treated as objects for satisfying men’s desires (MacKinnon 1989). Masculinity is defined as sexual dominance, femininity as sexual submissiveness: genders are “created through the eroticization of dominance and submission. The man/woman difference and the dominance/submission dynamic define each other. This is the social meaning of sex” (MacKinnon 1989, 113). For MacKinnon, gender is constitutively constructed: in defining genders (or masculinity and femininity) we must make reference to social factors (see Haslanger 1995, 98). In particular, we must make reference to the position one occupies in the sexualised dominance/submission dynamic: men occupy the sexually dominant position, women the sexually submissive one. As a result, genders are by definition hierarchical and this hierarchy is fundamentally tied to sexualised power relations. The notion of ‘gender equality’, then, does not make sense to MacKinnon. If sexuality ceased to be a manifestation of dominance, hierarchical genders (that are defined in terms of sexuality) would cease to exist.