John Grierson CBE(1898 - 1972) was a pioneering Scottish documentary maker, often considered the father of British and Canadian documentary film. He was the first person who uses the word "documentary" to describe film making that involved real people, and not actors, and situations taken from real life.
He described his approach to the films as
"the creative treatment of actuality" using "fragments of reality"
Grierson was born in Perthshire, Scotland, son of a school headmaster. He studied philosophy at Glasgow University, but was drawn into film-making through post-graduate study in the US. His ground-breaking work on the Scottish herring fleet, Drifters, has its premiere in 1929 alongside the first British showing of Eisenstein's Battleship Potemkin. In 1936, he produced the celebrated Night Mail, directed by Harry Watt with script by W.H. Auden and score by Benjamin Britten.
He has a great influence of mass media on public opinion