Marshall McLuhan, Canadian author and theorist (died 1980)

Herbert Marshall McLuhan was a Canadian philosopher whose work is among the cornerstones of the study of media theory. Raised in Winnipeg, McLuhan studied at the University of Manitoba and the University of Cambridge. He began his teaching career as a professor of English at several universities in the United States and Canada before moving to the University of Toronto in 1946, where he remained for the rest of his life. He is known as the "father of media studies".

July 21 is the 202nd day of the year in the Gregorian calendar; 163 days remain until the end of the year.