Propaganda must be total. The propagandist must utilize all of the technical means at his disposal — the press, radio, TV, movies, posters, meetings, door-to-door canvassing. Modern propaganda must utilize all of these media. There is no propaganda as long as one makes use, in sporadic fashion and at random, of a newspaper article here, a poster or a radio program there, organizes a few meetings and lectures, writes a few slogans on walls: that is not propaganda.

Vintage, p. 9 - Propaganda: The Formation of Men's Attitudes (1965)