There is no such thing as "laws" or "rules", only "actions" and "consequences", Nature has it;s consequences for every action, and by simply allowing consequences to play out, rewarding and punishing the actions of individuals, we will allow the traits which leads to better outcomes to emerge and show themselves over time.
Bottom-up emergent selection is far better than any top-down system of eugenics human beings could ever come up with IMO.
It's why I support capitalism and freedom a lot more than NatSocs do, National Socialist social programs are always going to be dysgenic, just less dysgenic than the social programs of other systems. A short-term tolerance of some degeneracy without bailing degenerates out of the consequences of their behavior is what leads to no more degeneracy, since degenerate behaviors are by definition self-destructive.
What NatSoc does is protect the genes for degenerate behavior by simply banning and punishing those behaviors.
Meaning that the carriers of those genes are merely hidden within the population, and possibly just doing their sick shit in secret, thus making the degenerate an even more dangerous individual to society than they previously had been.
I prefer my enemy dies of their own self-inflicted wounds, "hoisted by their own petards", then by my hand, as then they have no one to blame for their end but themselves, and their only possible complaint to me is that after they blew themselves the fuck out, I refused to help them get back on their feet again, to which I say "but you said that doing the things you were doing had no significant risks to yourself, according to you, you wouldn't need my help, and so I made those the terms of allowing your behavior, that I wouldn't be held responsible for the consequences of your decisions, either find a way to help yourself out of this, or learn how to live with the results of your chosen path".
It leaves a lesson behind for the eternal record, which I also like, since it provides an example of why future generations should not walk down the same path as these failures,a and why these things are as they are.