Marshall McLuhan is one of the most influential critics of media and communications of the twentieth century. His best known works include The Gutenberg Galaxy and Understanding Media.
 

“Ours is a brand new world of allatonceness. ‘Time’ has ceased, ‘space’ has vanished. We now live in a global village… a simultaneous happening. We are back in acoustic space. We have begun again to structure the primordial feeling, the tribal emotions from which a few centuries of literacy divorced us.”

– The Medium is the Massage: An Inventory of Effects