There's a lot I don't like about this Parag Khanna essay, but I find his observations about inequalities in cities really helpful. If he's right and the city is a more important organizational unit than the nation, what does it mean that economic inequality is now right in our faces, embodied in the border between a $2b private home and a massive slum. While I think Khanna is missing lots of critical questions – where do we generate energy? grow food? get our drinking water? – this observation makes the piece worthwhile for me.