In 2007, Doris Lessing was the first author with major works in the genre of Science Fiction to win the Nobel Prize of Literature. But would be possible for a Science Fiction author win such prize before 2007? If so, which ones? My bets: Clifford Simak, Kurt Vonnegut Jr. and Ursula K. Le Guin. Yours? EDIT: Preference for authors that admit that their work is Science Fiction. Lessing did admit it and defended the genre.