Marshall McLuhan


This week we talked about McLuhan and his Tetrad; before discussing about it what is it exactly?

For McLuhan the most important is not the message but the media use to diffuse this message. He summarized his ideas on a tetrad of media effect; the tetrad answers to four questions:

  1. What does the medium enhance?
  2. What does the medium make obsolete?
  3. What does the medium retrieve that had been obsolesced earlier?
  4. What does the medium flip into when pushed to extremes?

An example of McLuhan Tetrad with Medium on subject:

This figure talks by it-self. And I will try to apply it to Internet 2.0, and social media.

First Tetrad for Internet 2.0, according to another wordpress blog (

Then according to the same source for Social media such as Facebook

As a conclusion I can say that Marshall McLuhan was ahead of his time.

In order to create my post I find help and informations on website such as:




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