Arthur Meier Schlesinger, Jr., born Arthur Bancroft Schlesinger (October 15, 1917 – February 28, 2007), was an American historian and social critic. He was awarded the Pulitzer Prize. His work explored the liberalism of American political leaders, especially that of Franklin D. Roosevelt, John F. Kennedy, and Robert F. Kennedy. He served as Special Assistant and Court Historian to the President in John F. Kennedy's administration. He wrote a lot about the Kennedy administration. These writings have the title "A Thousand Days". 