Eh, no nuclear war for me. I don't think the world is perfect, but I'm not ready to write 99 percent of the world's population off (via horrifying and gruesome deaths in a lot of cases). There's room for improvement, but I don't think all hope is lost. And I think we'll make it to other planets, or at least safely into space somewhere, before we're wiped out here on Earth. I'd rather get some of our eggs out of this single basket we currently have than blow up the basket with all our eggs still in it.