nostr:npub1f7twcv30qr0jz37sp5kv3qrvx5u2u7qhe44f4ucfhsgw3ksygkrsdg3yrk nostr:npub1ju9twlemhqcy89vstf89k0kyzethk4r5kqktyt4jwxrnhw3ncq3qugwspp nostr:npub1xza6snv9yt4fr773uwcfsexm3huunmmwdel8z3tdkkfjdmvlgshqa9veu8 there's a short book by Edgar Rice Burroughs, The Lost Coninent, where the entirety of civilized Europe has fallen and reverted to a stone aged people after WWI, and the more civilized and organized muslim negros are conquering all the way into Northern Europe. 
(good book, btw)