Map of gentrification. Rent is the cycle circle. Things were built here before. As things get uncool, less development occurs. The area becomes blighted. Bums are the precursor. Rent is low. Businesses move in. An art gallery? A cafe. A corner store with organic milk and gourmet candy. A successful restaurant moves in. The rent goes up, again. Everyone comes here. Development comes. The rent is too high. Things start to fall apart again.