The parallel is not quite exact. For those Dark Ages were not really so very dark—they were full of flickering lanterns, and even if the light had gone out of Europe altogether, there were other rays, literally from China to Peru, at which it could have been rekindled. But the Dark Ages that are to come will cover the whole world in a single pall; there will be neither escape nor sanctuary, save such as are too secret to be found or too humble to be noticed. And Shangri-La may hope to be both of these. The airman bearing loads of death to the great cities will not pass our way, and if by chance he should he may not consider us worth a bomb.

James Hilton