Living in one of the nicer parts of urban Philadelphia, between Rittenhouse Square and University City, I see bits of the best and worst of a city on a near-daily basis. I have to slide my money under bulletproof glass at the gas station next door; I try to carry bills smaller than $20s because it's annoying to the clerk who just did a money drop. But I also see people talking to, asking help from, and just generally getting along with strangers.