[theFco]

I did not use the word oppression. Personally I think it is more lack of imagination.

Given the current state of technology, it is fairly easy to know who is the father of a kid.

Personally, I do not feel the drive to polygamy, in particular because I think it is very emotionally demanding of all the participants and ultimately exhausting and unstable.

I don't know what the "natural forces of nature" are, but of course many, many animal species do not establish monogamous relationships and they still manage to surivive.