12000 to 14000 years ago there was tribulation too, people escaping from whatever triggered the ice age just before that, give and take a few hundreds of years.
In India it was assumed nuke-war and global cooling, others speculate a little mile wide object from space hit earth, again others speculate burp-up from several super volcanoes, we don't exactly know, but people research, assume, hide some findings,
clothe them in fancy religious dressings and then write books about it, explode tens of thousands assumptions in YouTube or go right to fake news.
  So why not try to live all together right now, and make go into the future than let past meddling perennial take over and over again....