See that redhead teen girl seated in the back of the bus, her nose buried in a paperback book? She’s one of the approximately 1.1 percent of the population that remained behind. Where did everyone else go? And why? I’m afraid she knows little more than you do. Sometimes the truth is just the shape of the hole left when everything we know has gone away. A world-shaped void bounded only by the will to live, and the gray line.