Harold Lasswell explaining the difference between propaganda and education in 1935:
The spread of controversial attitudes is propaganda; the spread of acceptable attitudes is skills education. It is proper to speak of Communism as propaganda in Chicago and as education in Moscow.*
Today, of course, we could define propaganda and skills education in exactly the same way but the examples would be reversed.
*Quoted in Wolfgang Schivelbusch. 2006. Three New Deals. New York: Picador, 74.