Notable signs of the impending apocalypse

The experts agree: the sign is writing books, obviously. From an Assyrian source of around 2,800 BC:

Our Earth is degenerate in these later days; there are signs that the world is speedily coming to an end; bribery and corruption are common; children no longer obey their parents; every man wants to write a book and the end of the world is evidently approaching.

That quote has a long post-history: Cicero stole it!

Times are bad. Children no longer obey their parents, and everyone is writing a book.