"Twilight" is a science fiction short story by American writer John W. Campbell originally published in 1934 in Astounding Stories, and apparently inspired by H. G. Wells' article The Man of the Year Million. In 1970, it was selected as one of the best science fiction short stories published before the creation of the Nebula Awards by the Science Fiction Writers of America. As such, it was published in The Science Fiction Hall of Fame Volume One, 1929-1964.