Does anyone ever have these? It's not like I consciously think about them, but they're always floating around in the back of my mind. Maybe it's because I had biblical prophecy preached to me all growing up. I will go extended periods of time without contemplating the end of the world, but then other times I get this feeling that another world war is so immenent which will destroy most of humanity or make the earth uninhabitable or miserable for the people who do survive. It kind of puts a damper on my optimism.