In the 1970s a prominent social science researcher by the name of Thomas Schelling surprised his colleagues (and a bunch of other people) by building a computational/mathematical model that showed that only a slight racial, or color-based preference in a buyer’s geographic decision on a home purchase can create very segregated societies. In other words, that communities in cities and rural areas which tend to be heavily dominated by specific group or demographic can result, even when people living in those communities are not necessarily super racist or bigoted.

Before you go hang a huge sign outside your door that celebrates the end of racism or something, [...]