In 1933, John W. Hill opened the New York office of what wouldbecome the most important public relations agency in history:Hill & Knowlton, Inc. By 1959, the combined sales of itsclients--which included Procter & Gamble, Texaco, Gillette, andAvco Manufacturing as well as the steel, tobacco, and aviationindustries' trade associations--amounted to 10 percent of thegross national product. The Voice of Business chronicles Hill& Knowlton's influence on...