"A Playable Post on the Shape of Society"

This is a cute little simulation game about how individual and collective biases shape segregation in society. You can play around with boards with preference for more diversity, less diversity, indifferent to diversity and see how that shapes clusters of shapes. Of course, it doesn't directly address institutional and structural racism as changing neighbourhood makeup and diversity in institutions goes beyond the takeaway of "Demand diversity near you", but it's an interesting simulation. The game, from developer Nicky Case and mathemusician Vi Hart, is based on Thomas Schelling's segregation model.

Wired has a write-up about it as well, which includes a racial map of the U.S.