 These include aesthetic conventions, audience expectations, technological limitations and ethical or political considerations.In his "Theory of the Film", Béla Balázs discussed a theoretical argument against adaptation, based on the idea that if there is "an organic connection between form and content in every art" then it must be concluded that "one may perhaps make a good film out of a bad novel, but never out of a good one".With the rise of prestigious and well-funded TV series in what is considered a Golden Age of Television in the 21st century, some works previously considered unfilmable have undergone visual adaptations.