I don't see how you could live in a megalopolis and not see the need for an AR 15
View attachment 340058
The PRIMARY job of urban planning is to keep different groups functionally separate.
In Tulsa, 61st and Peoria (high crime area) is a short walk from Brookside (young hipsters) and sits nestled between the million $ homes in Midtown and the half-million $ homes in South Tulsa.
You can walk for an hour and pass through all three areas.
Strategic placement of highways, zoning, placement of green spaces and drainage, etc. keeps them each feeling like separate communities.