I have an extensive background in science fiction. I have read most of the great masters of the mid 20th century. I have read Dune, Foundation, watched Star Trek, and there is absolutely nothing in Star Wars that isn’t in classic science fiction. The Force is not fantasy, it is science fiction. Not so different from Paul Attredies or The Mule or Gary Mitchell. There is no genre called space fantasy. That is something Lucas made up and what he created fits snugly into science fiction as it was written at that time. And he knew it.