Detroit was built up by the auto business, and as the business has become more international, has shrunken as different parts of the business have moved to othe

Detroit was built up by the auto business, and as the business has become more international, has shrunken as different parts of the business have moved to other cities and other countries. The sense of anarchy is a function of low-density caused by people moving away, leaving empty spaces and absentee landowners. Unfortunately, there's not any really easy way to force people to re-concentrate in areas, to create a new city, and satellite cities.