[roenxi]

For such an interesting topic, the many of the leading examples seemed weak. The racial segregation one seemed a bit strange to me too (is racism really the only reason people can think of? If an area is undergoing radical demographic shifts then there is going to be a lot going on), the business one seemed vague and the Independence one is underexplored.

It is an important topic but I wouldn't recommend reading this article on it. It seems to be a just-so story situation without much meat on the bone.