There is, it's eugenics. We can absolutely select against psychopath traits and select for altruistic, greater good, communal self-sacrificial traits. We have the science.

how would you implement this without going into nazi-like levels of control on the individual? assuming "we have the science".

Lmao you can’t. Eugenics is evil and denies reproductive rights, bodily autonomy at the most basic animal level. It is literally the idea of creating a master race and culling off anyone who doesn’t conform.

If you find yourself in a situation where you want to do something Nazis did — just not that way — you are halfway there.