 The following sections discuss more developed views taking off from these ideas.  Section 4.1  discusses theories that are both mentalistic and individualistic: i.e., those holding that the metaphysical source of a person’s social categories is that person’s own mental states.  Section 4.2  discusses mentalistic theories that involve many or all the mental states of people in a community, rather than each person for herself.  Section 4.3  discusses theories that regard social categories to be set up by patterns of properties and causes.  Section 4.4  discusses theories that include practices in setting up social categories, and  section 4.5  discusses pluralistic and heterogeneous theories.  Section 4.6  discusses the potential roles for language in setting up social categories.