Marshall McLuhan (1911-1980) was an internationally-renowned media theorist and perhaps the first genuinely “modern” philosopher of communications. In the 1950s, he introduced the concept of the “global village,” a vast global “technological mind” that today would be called the Internet. Using humor and scholarship, he spoke of the interconnectedness of visual and written media—and nowhere do his theories achieve a more finished level than in the tetrads, as important visually as they are syntactically.

THE LOST TETRADS OF MARSHALL McLUHAN Marshall McLuhan and Eric McLuhan Marshall McLuhan was the visionary theorist best known for coining the phrase “The medium is the message.” Now, his media scholar son Eric has recovered all the “lost” tetrads that he and his father developed, and accompanies them here with accessible explanations of how they function. More