David Herbert Donald was a renowned American historian and Pulitzer Prize-winning biographer, best known for his work on Abraham Lincoln.
Henry Steele Commager was an American historian, educator, and prolific author, renowned for his expertise in American history and contributions to the field.
Arthur M. Schlesinger Jr. was an esteemed American historian, writer, and advisor to presidents, known for his insightful chronicles of U.S. history and politics.