Lawrence Person has attempted to define the content and ethos of the cyberpunk literary movement stating:
Classic cyberpunk characters were marginalized, alienated loners who lived on the edge of society in generally dystopic futures where daily life was impacted by rapid technological change, an ubiquitous datasphere of computerized information, and invasive modification of the human body.
Cyberpunk plots often center on conflict among artificial intelligences, hackers, and megacorporations, and tend to be set in a near-future Earth, rather than in the far-future settings or galactic vistas found in novels such as Isaac Asimov's Foundation or Frank Herbert's Dune. The settings are usually post-industrialdystopias but tend to feature extraordinary cultural ferment and the use of technology in ways never anticipated by its original inventors ("the street finds its own uses for things"). Much of the genre's atmosphere echoes film noir, and written works in the genre often use techniques from detective fiction. There are sources who view that cyberpunk has shifted from a literary movement to a mode of science fiction due to the limited number of writers and its transition to a more generalized cultural formation.