What social and cultural purposes or functions do marriages provide? Think cross-culturally. What social and cultural purposes or functions do families provide? What social and cultural purposes or functions do kinship groups provide, cross-culturally? Describe at least one group identity, other than grouping in a marriage, family, or kinship group, and describe its social and cultural purposes or functions, also. Explain how these social and cultural functions help you foster a healthy interdependence with your peers at school/work in order to reach out to others.