Are offspring required for humans to have a stake in environment for humans?

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Are these the two types of societies?

The science behind monogamy is to subvert the 80 20 rule of nature and stop evolution and natural selection in favor of building a SOCIETY where every man can have a family and therefore a stake in SOCIETY because he wants a good world or his kids to live in. To build human cooperation I suppose.

Don't worry though. It's going away now. That pesky cooperation is going out the window as SOCIETY favors natural selection by allowing 20% of the males breed with 80% of the women and sacrificing 80% of the males to the meat grinder that is the genetic lottery. You're born and there's a chance you might be chad, if you're not then your line ends right there and so does your stake in society in theory.

Do males really lose stake in society without children?