Ursula K. Le Guin: “Science Fiction and the Future”:

“When we look at what we can’t see, what we do see is the stuff inside our heads. Our thoughts and our dreams, the good ones and the bad ones. And it seems to me that when science fiction is really doing its job that’s exactly what it’s dealing with. Not “the future.” It’s when we confuse our dreams and ideas with the non-dream world that we’re in trouble, when we think the future is a place we own. Then we succumb to wishful thinking and escapism, and our science fiction gets megalomania and thinks that instead of being fiction it’s prediction, and the Pentagon and the White House begin to believe it, and we get True Believers conquering the future by means of SDI.”