Guelzo, Allen C.: - Allen C. Guelzo is a New York Times best-selling author, having published several works on Civil War-era history, including Robert E. Lee: A Life, Gettysburg: The Last Invasion, Fateful Lightning: A New History of the Civil War and Reconstruction, and Lincoln's Emancipation Proclamation: The End of Slavery in America.

Hankins, James: - James Hankins was a professor of History at Harvard University and founder and General Editor of the I Tatti Renaissance Library. He is widely regarded as one of the world's leading authorities on Renaissance philosophy and political thought.