Chemical weapons aren't going to be how the world ends. They're far too limited in scope. As for biological and nuclear weapons. Bio weapons are unlikely too for the following reason. If the bioweapon were launched by a non state actor, like terrorists, it could be contained, and we would survive. It could cause devastating destruction, but it wouldn't end the world. And no sane state would do it, because they could just use nuclear weapons for that purpose and bioweapons would devastate them as well. As for nuclear weapons, it's not impossible, but mutually assured destruction means both sides will try very hard to prevent that happening. I suspect neither side would strike first, and thus nobody strikes. If we wipe out civilization as we know it with nuclear weapons, id put my money on it being an accident. Someone screwing up big time. We've gotten close a few times that way.
You also have natural disasters. Just the right kind of viral pandemic could seriously disrupt civilization, but we would survive. Down but not out.
So barring accidental nuclear annihilation. Theres the one in a trillion chance of other natural disasters. Super volcanoes. Gamma ray bursts etc, but we can't do anything about that and theres none predicted to the little to no extent that we can predict it.
I wouldn't worry about any if that. If you enjoy worrying, I would be worrying about the long term, slow deterioration of civilization, rather than anything happening fast. For example climate change or something, causing enormously large displaced andor famine stricken populations causing serious food and national security problems. Destabilizing society leading to large numbers of desperate people. In that state, people will be willing to get on board with and tolerate government policy that could seriously threaten our current quality of life and freedoms. The end of the world as we know it, but so gradually we don't know it happened until we have the benefit of hindsight. We'll likely recover from that too. Unfortunately if you're still alive to see the destruction happen, you'll definitely be dead by the time of reconstruction, so enjoy life today.
I'll tell you what it wont be, it wont be anything to do with an ancient prophecy, except by profound coincidence.
And don't bother throwing out your tv. There is in fact brainwashing coming through the tv, but all it's mostly just telling you to do is buy a new phone and go to mcdonalds and shit. You woulda done most of it anyway.
Which is a shame, because they've gotten lots of national news in the last couple years due to the successful Sawant campaigns in Seattle.