Which is a belief of those who hold the idea of natural rights

I can't verify the answer but here is a link
https://en.wikipedia.org/wiki/Natural_and_legal_rights

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.