H. L. Gold was the first editor. He made "Galaxy" the leading science fiction magazine of its time. He published stories about social issues, not just technology. Gold published many well-known and important stories, including: Robert A. Heinlein's "The Puppet Masters" and Alfred Bester's "The Demolished Man". He also published Ray Bradbury's "The Fireman", which later became the novel "Fahrenheit 451".