Marshall McLuhan quotes - page 14
We now live in a technologically prepared environment that blankets the earth itself. The humanly contrived environment of electric information and power has begun to take precedence over the old environment of "nature." Nature, as it were, begins to be the content of our technology.
Marshall McLuhan
Although the medium is the message, the controls go beyond programming. The restraints are always directed to the "content,” which is always another medium. The content of the press is literary statement, as the content of the book is speech, and the content of the movie is the novel. So the effects of radio are quite independent of its programming.
Marshall McLuhan