If last week's election proved anything, it's that the city continues to be the dominant (and ascendant) force in U.S. politics, mirroring its role in the post-industrial economy and culture. Republicans will of course continue to redraw district lines in the attempt to deny this obvious truth, but they are throwing sand into a rising tide. The post-war era of suburban sprawl is winding down; it just wasn't realistic to think that our society could afford to let everyone build a castle in the middle of nowhere. This was the implicit promise of the Republican candidate; it's the reason so few Americans could listen to him with a straight face. As with any accrual of power, there are risks. The challenge for cities will be to ensure that a diversity of people can afford to live within its borders; as so often has been the case, going all the way back to the French Revolution, there must be a redistribution of wealth, so that the government can be said to represent more than a small faction of its people. Otherwise the city will soon start to resemble the suburban landscape so many of us sought to escape, and we will be fleeing the new conformity for something more chaotic and promising.