We live in an age of persuasion. Leaders and institutions of every kind–public and private, large and small–must compete in the marketplace of images and messages. This has been true since the advent of mass media, from broad circulation magazines and radio through the age of television and the internet. Yet there have been very few true geniuses at the art of mass persuasion in the last century. In public relations, Edward Bernays comes to mind. In advertising, most Hall-of-Famers–J. Walter...
