I was thinking about sundown towns lately. They are rare in the Deep South. The reason being that poor blacks in the past lived near the wealthy people they worked for. That is still the case today.
Instead of sundown towns, the Deep South has sundown neighborhoods. A poor all black neighborhood will be next to a wealthy all white neighborhood.
I remember one clear example of this in Columbia, South Carolina. I would take Gervais St. downtown from where I lived in Forest Acres. In one stretch of the road, there was a clear divide. On one side, were poor neighborhoods and some of the so-called Projects, the government housing. A white person like me would unlikely ever purposely drive into that area. But on the other side of the road was an expensive neighborhood of beautiful large houses. No black person (or even poor white person) would venture into that neighborhood, unless they had business to do there, especially not at night.
The divide was stark. There were no walls to separate the two sides of the road. Any poor black person theoretically could cross the street and go into that wealthy white neighborhood, and vice versa, but I doubt it happened very often. That stretch of road and the neighborhoods on either side probably were heavily policed. That road was a well-maintained border, as if it were a wall.
I drove down that street on a regular basis. I stopped thinking about how strange it was. It just became part of the background. If you lived there your whole life, you’d probably never give it any thought at all. It is similar to how it never occurs to many white people in the North how the town they live in ended up all white or that it ever had a black population.
What interests me is what is not thought about and so not seen.