Which theorist said that mass media are extensions of the human body and human mind?

Question

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Marshall McLuhan is the theorist who argued that mass media are extensions of the human body and human mind. He coined the famous phrase "the medium is the message" which suggests that the characteristics of the medium itself shape and control the messages it conveys. McLuhan believed that the advent of mass media, particularly television, would fundamentally change our way of perceiving and understanding the world.

Which Theorist Said That Mass Media Are Extensions of the Human