I agree that it is probably some of both. When nature and nurture align in a good direction it really benefits society. When they align in negative directions then it often causes great harm. There seemd to be no effort to direct certain groups in a positive direction. It seems to be the opposite.
Nature just provides the “plan”, nurture makes the man.
What would happen to persons raised without any interaction with people: what would they become with no nurture?
Not sure they would be “human”.
And no, I do not advocate trying any such thing just to see...