Graham Allison is the Douglas Dillon professor of government at Harvard Kennedy School, where he has taught for five decades, and a leading analyst of national security. Allison was the founding dean of Harvard’s John F. Kennedy School of Government and served as director of its Belfer Center for Science and International Affairs until 2017. He was assistant secretary of defense under President Clinton and special adviser to the Secretary of Defense under President Reagan. A best-selling author, Allison’s latest book is “Destined for War: Can America and China Escape Thucydides’s Trap?”