Yeah, the point I was trying to make was that marriage and family isn't necessarily some kind of evolutionary imperative, and it doesn't really help the argument to pretend it is. There are plenty of benefits to it without having to invent fake scientific connections.
Thanks, I was going to say exactly that. I agree with most of the other comment, but the biological part did not sound correct to me. Biologically, we should impregnate as much people as possible, and monogamous couples would not be the standard.