"Toward whom must propaganda be directed,” he asked, “toward the scientific intelligentsia or toward the uneducated masses?” His answer was, “It must always and exclusively be directed toward the masses. The teachability of the great masses is very limited, their understanding small, and their memory short.” In a word, he believes that it pays to take advantage of ignorance and that it is therefore best to keep the people ignorant. [From the pamphlet: What is Propaganda?]
The above link provides the context, background, and name of the speaker. Drawn from Robert Townsend's G.I. Roundtable website:
The American Historical Association produced the G.I. Roundtable Series to help win World War II. Or so they were led to believe. In fact the U.S. Army sought the pamphlets as part of a larger effort to prepare for the transition to the postwar world, and represent a novel effort at social control.