Ambassador Jack Matlock, Ph.D., is currently a visiting scholar at Duke University. He is a career diplomat who served on the front lines of American diplomacy during the Cold War and was U.S. ambassador to the Soviet Union when the Cold War ended. Since retiring from the Foreign Service, he has focused on understanding how the Cold War ended and how those lessons might be applied to public policy today. He has held academic posts at Columbia University, Princeton University, Hamilton College, Mt. Holyoke College and the Institute for Advanced Study, where he was the George F. Kennan Professor from 1996 to 2001.