* Considered the "father of public relations"
* Influenced by his uncle Sigmund Freud's work on psychoanalysis
* Worked for many corporations and organizations, including the American Tobacco Company, General Motors, and the United Fruit Company
* Developed the concept of "engineering consent," which is the idea that the media can be used to shape public opinion in a desired way
Ivy Lee
* Known as the "father of modern public relations"
* Worked for many high-profile clients, including John D. Rockefeller, Standard Oil, and the Pennsylvania Railroad
* Developed the concept of "publicity," which is the idea of managing the flow of information to the media in a way that is favorable to a client
* Believed that public relations should be based on honesty and transparency
Walter Lippmann
* A journalist, philosopher, and political commentator
* Wrote several influential books on public opinion and propaganda, including _Public Opinion_ (1922) and _The Phantom Public_ (1925)
* Argued that public opinion is largely shaped by the media and by elites, and that the public is often unaware of the forces that are influencing them
* Believed that democracy requires an informed citizenry, and that the media has a responsibility to provide citizens with accurate information