From The Modern Century (1967) by Northrop Frye:

If certain tendencies within our civilization were to proceed unchecked, they would rapidly take us towards a society which, like that of a prison, would be both completely introverted and completely without privacy. The last stand of privacy has always been, traditionally, the inner mind. It is quite possible however for communications media, especially the newer electronic ones, to break down the associative structures of the inner mind and replace them by the prefabricated structures of the media. A society entirely controlled by their slogans and exhortations would be introverted because nobody would be saying  anything: there would only be echo, and Echo was the mistress of Narcissus. It would also be without privacy, because it would frustrate the effort of the healthy mind to develop a view of the world which is private but not introverted, accommodating itself to opposing views. The triumph of communication is the death of communication: where communication forms a total environment, there is nothing to be communicated.