"I came up with Detroit. (Sorry, sports fans.) Vast stretches of the city are already uninhabited, crumbling. The central temples, yes, are still in use — the temples for sports, conventions and ritualistic music concerts — but for how much longer? Will the beautiful deco buildings erected as working shrines by what were once the largest companies in the world (GM, Ford) soon be abandoned? They’re already surrounded by a no man’s wasteland; it seems only a matter of time. And then how long before people wander into that zone and ask themselves, “Who built this incredible building?"