Two weeks ago Elon Musk told a journalist that humanity had to establish itself on another planet before man-made terrestrial conflicts trapped it. He told GQ: You know, in 1912 they were proclaiming a new age of peace and prosperity, saying that it was a golden age, war was over. And then you had World War I followed by World War II followed by the Cold War. So I think we need to acknowledge that there's certainly a possibility of a third World War, and if that does occur it could be far worse than anything that's happened before. Let's...