My parents grew up in white, working class neighborhoods in the 1950s.

The families were extremely unstable. There was stigma to straight up divorce, and lots of “everything is fine” when it wasn’t.

Both parents were raised by grandparents, aunts/uncles, etc.

They turned out very well.

I guess that reinforces the authors point.

When marriage isn’t about individual fulfillment, but supporting the community, you get unhappy marriages but stronger communities.