Allen C. Guelzo is the Henry R. Luce Professor of the Civil War Era, and Director of Civil War Era Studies at Gettysburg College. He is the author of Abraham Lincoln: Redeemer President and Lincoln's Emancipation Proclamation: The End of Slavery in America, both of which won the Lincoln Prize. His most recent books on Lincoln and the Civil War era are Lincoln and Douglas: The Debates That Defined America and Lincoln: A Very Short Introduction.