Quoting History: Laswell on mobilizing minds (1927)

We are witnessing the growth of a world public, and this public has arisen in part because propaganda has at once agitated and organized it.. There is no doubt that democratic governments must assume the task, regardless of all complicating difficulties, of mobilizing minds as well as men and money in war.

— Harold Lasswell, Propaganda Technique in World War I (originally published in 1927) (also cited in Osgood’s Total Cold War: Eisenhower’s Secret Propaganda Battle at Home and Abroad).