Enormous improvements in communication
have made understanding more difficult.
"I am pleased to think of my own book The Gutenberg Galaxy as a footnote to the observations of Innis on the subject of the psychic and social consequences, first of writing then of printing."
Both McLuhan and Innis assume the centrality of communication technology; where they differ is in the principal kinds of effects they see deriving from this technology. Whereas Innis sees communication technology principally affecting social organization and culture, McLuhan sees its principal effect on sensory organization and thought. McLuhan has much to say about perception and thought but little to say about institutions; Innis says much about institutions and little about perception and thought.