Herbert Marshall McLuhan was a Canadian philosopher, scholar, and communication theorist. He is famous for his groundbreaking work in the field of media studies, particularly for his ideas about the impact of media on human perception and behavior. McLuhan coined the phrase "the medium is the message," suggesting that the form of communication is just as important as the content it conveys. Other synonyms for McLuhan include media theorist, communication analyst, cultural critic, and technology philosopher. McLuhan's ideas continue to influence modern-day discussions about media literacy, digital culture, and the ways in which technology shapes our thinking and society.