Please note this is categorized in off-topic philosophy.
Does Darwinian Nobility, capitalized no less, sound like a contradiction in terms? Not really. In the Descent of Man, Darwin talks about the noble nature of man like it was a tangible thing.
“Nor could we check our sympathy, even at the urging of hard reason, without deterioration in the noblest part of our nature.”
Who’s responsible for eugenics? Simple. People who don’t have the noble nature of man that Darwin mentions like a physical thing.
If you don’t instinctively know that the right thing to do is help rather than harm those less fortunate in life than you are then you lack Darwinian Nobility.
Is Darwinian Nobility due to nature or nurture? Who the hell knows. One or the other or both. All I know is the world would be a better place with more of it.