Understanding Media: The Extensions of Man

by Marshall McLuhan

This power of technology to create its own world of demand is not independent of technology being first an extension of our own bodies and senses. When we are deprived of our sense of sight, the other senses take up the role of sight in some degree. But the need to use the senses that are available is as insistent as breathing — a fact that makes sense of the urge to keep radio and TV going more or less continuously. The urge to continuous use is quite independent of the “content” of public programs or of the private sense life, being testimony to the fact that technology is part of our bodies. Electric technology is directly related to our central nervous systems, so it is ridiculous to talk of “what the public wants” played over its own nerves. This question would be like asking people what sort of sights and sounds they would prefer around them in an urban metropolis!