It's the end of the world. What would you do to survive?
I once read a horror novel where one of the heroes of the story was actually a librarian. She helped prepare others for an attack on their small town and at one point one of the other heroes (guy who liked her) and totally surprised that she knew all this stuff about survival asked her how she did. Her answer was (paraphrased): I read science fiction. Didn't you know we're prepared for anything?
Since most of my flist is into sci-fi...
If it was the end of the world either through invasion or humanity's hubris, how would you survive?