Every student taking Introduction to Sociology is a member of a population (male, female, Black, white), exists within a collectivity (sociology class, concert member, crowd), belongs to a social class (upper, middle, lower), interacts in a group (peer group, work group), comes from a family (two parent family, single parent family, blended family), lives in a community (small town, urban center, hometown), goes to an association (university, hospital,...