Herbert Marshall McLuhan, CC (July 21, 1911 – December 31, 1980) was a Canadian educator, philosopher, and scholar — a professor of English literature, a literary critic, a rhetorician, and a communications theorist. McLuhan's work is viewed as one of the cornerstones of the study of media theory.

McLuhan is known for the expressions "the medium is the message" and "global village". McLuhan was a fixture in media discourse from the late 1960s to his death and he continues to be an influential and controversial figure. More than ten years after his death he was named the "patron saint" of Wired magazine.

McLuhan was born in Edmonton, Alberta, to Methodist parents Elsie Naomi (née Hall) and Herbert Ernest McLuhan. His brother, Maurice, was born two years later. "Marshall" was a family name: his maternal grandmother's surname. Both of his parents were born in Canada. His mother was a Baptist schoolteacher who later became an actress. His father had a real estate business in Edmonton. When war broke out, the business failed, and McLuhan's father enlisted in the Canadian army. After a year of service he contracted influenza and remained in Canada, away from the front. After Herbert's discharge from the army in 1915, the McLuhan family moved to Winnipeg, Manitoba, where Marshall grew up and went to school, attending Kelvin Technical High School before enrolling in the University of Manitoba in 1928.