Here is an interesting observation. If we take a look at how different nations are distributed across big cities, we can see that many neighborhoods are race specific. A lot of cities have chinese, jewish, russian, mexican, etc. neighborhoods, meaning that people _naturally_ want to live with _similar_ people. What's more important, it happens organically. It's not like some organization or government forces people to move there. There are no incentives, no financial benefits. Nothing. People are free to live anywhere they want, but they still create those communities and prefer to live among their own kind. From this specific observation, it seems like racism is more like a biological thing, the product of evolution.