>>11409280Please tell me you're not so Goddamn stupid as to be making this argument unironically.
Human agency is critical. If someone, or a couple, decides to not have children because they think their genes are inferior for whatever reason, that's fine. If two people decide to have children together because they think their genes are superior or something, that's also fine.
Controlling who can breed with whom, however, goes into oppressive/genocidal territory. No one should be forced to have a child with anyone they don't want to, and no couple should be prevented from having a child if they want to have one. (I would, however, recommend proper education for that latter scenario; if a couple wants to have a child in order to save their marriage or relationship, for example, then they should be informed of how fucking terrible of an idea that is and how cruel it would be for the hypothetical child.)
Eugenics was a popular idea during the birth control movement in the 1920's, as the idea that a WOMAN could CHOOSE to not have children was a super novel concept and people were all excited about its applications. Then Hitler came along and demonstrated how awful eugenics actually is in practice, and it fell wildly out of favor with almost everyone.
It's really fuckin' simple, and you should feel ashamed that you need it explained to you.