John Wood Campbell Jr. (June 8, 1910 – July 11, 1971) was an American science fiction writer and editor. As editor of Astounding Science Fiction (later called Analog Science Fiction and Fact) from late 1937 until his death, he is generally credited with shaping the Golden Age of Science Fiction.
Isaac Asimov called Campbell "the most powerful force in science fiction ever, and for the first ten years of his editorship he dominated the field completely."
As a writer, Campbell published super-science space opera under his own name and moody stories under his primary and most famous pseudonym, Don A. Stuart. Campbell also wrote under the pen names Karl Van Kampen and Arthur McCann. He stopped writing fiction after he became editor of Astounding.
Campbell helped launch the career of science fiction author L. Ron Hubbard, and played a key role in the initial promotion of Dianetics.
His novella "Who Goes There?" was adapted as the films The Thing from Another World (1951), The Thing (1982), and The Thing (2011) .
He is also known as John Wood Campbell, Jr., John Wood Campbell Jr. and John Campbell.