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." Source: Wikipedia (en)