  Kant is concerned with inequality taking place within polygamous relationships. MacKinnon and Dworkin, on the other hand, believe that inequality is a much more widespread and pervasive phenomenon. It covers all aspects of our society. MacKinnon and Dworkin emphasise that we live in a world of gender inequality. A person’s gender is, for MacKinnon, clearly distinguished from a person’s sex. Gender, being a man or a woman, is socially constructed, whereas sex, being male or female, is biologically defined. Within our patriarchal societies, men and women have clearly defined roles: women (all women, women as a group) are objectified, whereas men (all men, men as a group) are their objectifiers (MacKinnon 1987, 6, 32–45, 50; MacKinnon 1989a, 113–4, 128, 137–40; Haslanger 1993, 98–101) (For more on sex and gender, see also the entries  feminist perspectives on sex and gender  and   feminist perspectives on power.) Even though MacKinnon does acknowledge that a female (sex) individual can be an objectifier and a male (sex) individual can be objectified, she takes it that the former is a man and the latter is a woman, since in her view a man (gender) is by definition the objectifier and a woman (gender) is by definition the objectified.