all thought, action and production, we are 
accomplishing our retribalization by the 
simultaneous, by the electronic, which tends to put 
us in a kind of auditory world, or field, of 
simultaneous sound in which the Intuitive Man takes 
precedence over the Analytic Man.

Marshall McLuhan to Edward S. Morgan, May 16, 
1959, Letters of Marshall McLuhan , (Toronto, 
1987), p. 255.