An alternative can be found on TV Tropes:
In 1953, Isaac Asimov published an article titled "Social Science Fiction" in . In that article, he stated that every science fiction plot ultimately falls into one of three categories: Gadget, Adventure, or Social.
To demonstrate what he meant by each, he used the example of three different late nineteenth century authors all being inspired to write new stories about the automobile, each going in one of three directions:
Asimov's theory explains the split between Verne's technological adventures and Wells' scientific-marvelous, as the latter's speculation into the unknown inevitably means changes to society--and thus becomes social science fiction.
It also explains the change in fashion brought on by Campbell and his descendants, as prior to Campbell's run at Astounding, science fiction stories tended to be adventures or Gernsback-inspired gadget stories. Campbell and his New York clique accelerated an existing preference for social science fiction (see: scientific-marvelous) into the dominant form for English markets. Those who did not or would not make the shift from adventure to social science fiction were ridiculed by the social science fiction writers, like in Asimov's inaccurate swipe at adventure stories above--and eventually excluded.
Finally, the three kinds of science fiction provide a framework for understanding why many popular works have such a "devastating effect upon science fiction as Gold and Campbell and Knight and Sturgeon and Kornbluth and the other Futurians loved and built it." Since Campbell, the primary form of science fiction has been social. But adventure science fiction has been beating down the doors, from classics from the past, the rise of new subgenres, new media franchises, and exposure to science fiction from other languages. Knight-style social science fiction does not hybridize well with adventure in the same way as Campbelline, French, and Japanese social science fiction, and its advocates maintain a frantic rearguard action to keep the adventuresome barbarians from the gates.