The Golden Age of Science Fiction, often identified in the United States as the years 1938–1946, was a period in which a number of foundational works of science fiction literature appeared. In the history of science fiction, the Golden Age follows the "pulp era" of the 1920s and 1930s, and precedes New Wave science fiction of the 1960s and 1970s. The 1950s are, in this scheme, a transitional period. Robert Silverberg, who came of age in the 1950s, saw that decade as the true Golden Age. According to historian Adam Roberts, "the phrase Golden Age valorises a particular sort of writing: 'Hard SF', linear narratives, heroes solving problems or countering threats in a space-opera or technological-adventure idiom."
A influence on the creation of the Golden Age was John W. Campbell, who achieved status as the most prominent editor of the time. Isaac Asimov stated that "...in the 1940s, (Campbell) dominated the field to the point where to many seemed all of science fiction." Under Campbell's editorship at Astounding Science Fiction, science fiction developed more realism and psychological depth to characterization than it exhibited in the Gernsbackian "super science" era. The focus shifted from the gizmo itself to the characters using the gizmo.
By consensus, the Golden Age began circa 1938–1939, slightly later than the Golden Age of Detective Fiction, another pulp-based genre. The July 1939 issue of Astounding Science Fiction is sometimes cited as the start of the Golden Age. It included "Black Destroyer", the first published story by A. E. van Vogt, as well as the first appearance by Isaac Asimov ("Trends") in the magazine. Later author-critic John C. Wright said of Van Vogt's story, "This one started it all." The August issue contained the first published story by Robert A. Heinlein ("Life-Line").
Many of the most enduring science fiction tropes were established in Golden Age literature. Space opera came to prominence with the works of E. E.