The significant revolution of modern times is not industrial or

economic or political, but the revolution taking place in the art of

creating consent among the governed . . . Within the life of the new

generation now in control of affairs, persuasion has become a self-conscious art

and a regular organ of popular government. None of us

begins to understand the consequences, but it is no daring prophecy

to say that the knowledge of how to create consent will alter every

political premise.

(Walter Lippmann, Public Opinion)