Socities have a Unity of Order, constrasted with the Unity of Substance, a useful example is a human person, and mere aggregation, people in a line, say.
This Unity of Order is a real Unity. At the end of the six days of creation, creation is crowned not with a new natural kind, or an aggregation of parts but the first society, the marriage of Adam and Eve.
This proper ordering of Adam and Eve in society, in specifically marriage, is the last act God performs before declaring creation “very good.” What made creation very good, is not yet another kind, but the proper ordering of creation. The typology of Adam and Eve’s proper ordering in marriage is of keen interest to both Jewish and Catholic exegesis. It is considered a type of Israel and the Church, respectively.
Indeed Augustine tells us that “Creation is for the sake of the church.”