If you’ve sat in an airplane’s window seat, you know what the world looks like from a mile up. It’s that point during takeoff and landing when you can pick out an individual car beetling along a highway; when, on a clear day, you can see the city bleed into its suburbs and trace the outline of a mountain range beyond but still find your favorite bocce court if you know where to look. Individual humans are barely detectable from this height, but humanity’s traces ooze to the horizon.