As most of society goes farther down the drain, I suspect there will be an increasing divide between those that take a stand with marriage and family, and those that do not. This may include arranged marriages, probably around Age 20-24 for women who, perhaps living at their father’s house, haven’t had much luck otherwise.
Contrary to today’s Disney Princess fantasies, most real princesses’ marriages were arranged. Also, they were something like mandatory. For normal people, arranged marriage was common, but not mandatory. Basically, the young couple had a veto.