Neighborhoods with low social cohesion, where people don’t know one another or trust one another, are bad for telomeres, and this is true at all income levels. It doesn’t matter to the telomeres whether you’re living in a sketchy part of a major city or you’re in a mansion on a suburban hill—if you do not have friendly relationships with your neighbors, if you don’t actually enjoy talking to them, chances are your telomeres are getting shorter by the day.