Considering there was a element of this in Europe amongst Europeans, it is hard to imagine, I have to admit. Even in America, the darker (Southern) Europeans were lumped in as an inferior racial group. This informs us how ideologically this is amongst Europeans. They are unable to experience the world without using eugenics concepts it seems. I have more and more been reading about Indigenous populations around the world and how they functioned in order to understand how the world was before the Europeans arrived with their settler colonialism. and invasions. I will leave it there because it is not yet a concept I can process yet. The answer to the question does like tens of thousands of years ago when well developed societies were present on the planet, many of them in the Global South.