Yes, but then we didn't evolve to form permanent pair bonds, did we? Maybe semi-permament. Maybe we were all mostly polyamorous.

The permanent monogamous pair bomds didn't happen until we clsimed land as property and then started thinking about people as property.

So the rise and evolution of our most current social structures have always been out of alignment with our biological evolution.

That's one of the reasons we're such a damn hot mess, as a species.