“Science fiction" means different things to different people. "When I make a word do a lot of work like that," said Humpty Dumpty, "I always pay it extra"—in which case the term science fiction has piled up a lot of expensive overtime.”

American science fiction author, engineer, and naval officer

Robert A. Heinlein was an American science fiction author, engineer, and naval officer. He is known as a major figure in twentieth-century science fiction, and is sometimes called the “dean of science fiction writers.” He was among the first writers to stress scientific accuracy in fiction, helping shape hard science fiction. His fiction and nonfiction often praise competence, encourage critical thinking, and place characters in situations that test conventional social values. His influence remains visible in the genre and in wider culture.