When a marriage is legitimate

In Care of the Self, the third volume of The History of Sexuality trilogy, Foucault summarizes the history of marriage. Elite pagans married to form alliances of wealth and power; the poor married for economic practicality (i.e., a poor man might marry a poor woman and they, with their family, could support themselves). These marriages needed only the family's blessing. From there, interests of the State and of the Church took root. Marriages became increasingly social and public.

We have a tendency to look to an institution's origins to inform us on resolving contemporary issues.