I watched the South Park episode “Over-Logging (On)” recently, in which the characters find that the Internet has suddenly disappeared. Pandemonium ensues. No-one, not even the TV news anchors, remembers how to get news, and some of the characters journey to California in a Great Depression era migration spoof to try and find some Internet there.
However, if for some reason the internet really did disappear (maybe due to some flesh-and-fiber optic cable-eating bacteria?), what would happen? Could our society easily go back to normal?