"I would say it's just better hidden."
Better hidden, since the advent of WWII, because ... ? Has the practice been adjudged as lacking scientific merit?
The Nazi practice of killing the brightest, most talented and productive members of society lacks scientific merit.
There's some current public policy based on the notion that we shouldn't be increasing welfare payments every times someone has another child.
Eugenics takes many shapes and forms. If your highest goal is survival of the species, diversity is probably more valuable than purity. Science doesn't set these kinds of goals; it merely describes how things work.