The family as a universal culture pattern.

All family types and other cultural phenomena develop in the interaction of human nature and social structure. Sociological laws concerning the family have universal validity. A particular family form is studied as a type in a general class including all families and is also studied in relation to everything in the culture within which that form exists. The marital process in all cultures begins in one family and ends in another. Persons everywhere use the same universal potentialities of human nature and proceed in the marital process as social-organic-mental unities.