YOU SEE; THE WORLD WON'T BE DESTROYED BY GLOBAL WARMING OR A METEOR, IT'LL BE DETROYED BY HUMANS. HUMANS WHO WILL TRY TO PREVENT THOSE THINGS BY ONLY MAKING THE PROBLEM WORSE, AND BY THE TIME WE'VE TRIED TO SOLVE THE PROBLEM WE HAVE, WE WILL ALL BE DEAD IN A WASTELAND UNTIL A NEW SPECIES OF LIFEFORM THAT WILL TAKE OUR PLACE.