Social Darwinistssss is correct.

Out of all his books, what we got was "survival of the fittest", and "breeding for a ubermench."

And so, the social movement was pushed into the biggest and strongest should rule over all.  Or more specifically, those willing to use the most violence should rule.

And that eugenics should be practiced throughout the world

It is these two underlying assumptions that are never questioned, and are the first things that should be thrown out in an enlightened society.