In Isaac Asimov's 1994 memoir, he called this man "the most powerful force in science fiction ever". This MIT grad was the head editor of Astounding Science Fiction (later called Analog Science Fiction and Fact) from 1937 to 1971. In 1996, this man, along with Jack Williamson, A. E. van Vogt, and Hugo Gernsback were the inaugural inductees into the Science Fiction and Fantasy Hall of Fame. Identify this editor and writer who wrote the novella Who Goes There?, the source material for The Thing.
John W. Campbell