In "The Persuaders," FRONTLINE explores how the cultures of marketing and advertising have come to influence not only what Americans buy, but also how they view themselves and the world around them. The 90-minute documentary draws on a range of experts and observers of the advertising/marketing world, to examine how, in the words of one on-camera commentator, "the principal of democracy yields to the practice of demography," as highly customized messages are delivered to a smaller segment of the market.