Walter Lippmann (1889–1974) was one of the most influential American journalists and political commentators of the twentieth century. A founding editor of The New Republic and later a Pulitzer Prize–winning columnist for the New York Herald Tribune, he shaped public debate on democracy, propaganda, and public opinion. His major works include Drift and Mastery, Public Opinion, and The Phantom Public. Nicholas Lemann is the director of Columbia Global Reports, a staff writer at The New Yorker, and dean emeritus of Columbia University’s Graduate School of Journalism, where he is the Joseph Pulitzer II and Edith Pulitzer Moore Professor of Journalism. He is the author of several acclaimed books, including Transaction Man, Redemption, The Big Test, and The Promised Land.