Stephen E. Ambrose (1936-2002) was a historian and professor who wrote on military history, presidential history, and American expansion and foreign policy. Ambrose has been praised for his biographies of Presidents Eisenhower and Nixon, and for helping to galvanize interest in World War II.

Kai Bird is a historian and Executive Director of Leon Levy Center for Biography at the City University of New York. He is best known for writing about the bombings of Hiroshima and Nagasaki, the Vietnam War, US-Middle East relations and biographies of political figures.  Bird is the author of American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer, for which he won a Pulitzer Prize, and The Good Spy: The Life and Death of Robert Ames, a New York Times bestseller. His most recent book is The Outlier: The Unfinished Presidency of Jimmy Carter.

David W. Blight is the Class of 1954 Professor of American History and Director of the Gilder Lehrman Center for the Study of Slavery, Resistance & Abolition at Yale University. Recently, Blight has written A Slave No More: Two Men Who Escaped to Freedom, Including Their Narratives of Emancipation, and Race and Reunion: The Civil War in American Memory, which won the Bancroft Prize, the Abraham Lincoln Prize, and the Frederick Douglass Prize.

H. W. Brands is a best-selling author, historian, and the Jack S. Blanton Sr. Chair at the University of Texas at Austin. He has written thirty books, including The Zealot and the Emancipator, a dual biography of the abolitionist John Brown and President Abraham Lincoln, as well as The First American and Traitor to His Class, both finalists for the Pulitzer Prize and the Los Angeles Times Prize. 

Douglas Brinkley, a distinguished professor of history at Rice University and Contributing Editor of American Heritage, has written more than 20 books, most recently The Wilderness Warrior: Theodore Roosevelt and the Crusade for America (Harper 2009) and The Reagan Diaries (HarperCollins 2007). Brinkley earned his B.A from Ohio State University University in 1982, and his Ph.D. from Georgetown University in 1989.