Commenter feels the urge to step away from the question.  Instead he doubles down and jumps to "gang-infested inter-cities".  My response - KD48, you cannot avoid the 600 lb. elephant in the room.  Try reading, and some of the avoidance you are good at will become less of an issue.  Start with David Cutler's work entitled Rise and Decline of the American Ghetto.  Blacks fled the old south because there was no work there.  They fled to the north only to be welcomed by bigoted and racist whites.  Redlining and restrictive covenants were used to "drive immigrants of a certain racial classification into a particular area of the city".  Middle class blacks were unable to secure mortgage loans.  Even though the Supreme Court struck down restrictive covenants in 1948, whites found short-cuts.  In recent years states like Texas, Maryland, and Georgia have seen a return of educated minorities back to their states.  Imagine that.