1977-79, Deputy to Undersec. of State for Security Assistance, Science and Techn.; Chair, Nat'l Security Council Group on Non-Proliferation of Nuclear Weapons. Former: Director, Center for Int'l Affairs; Dillon Professor of Int'l Affairs and Associate Dean of Arts and Sciences, Harvard. 1993-94, Chairman, Nat'l Intelligence Council. 1994-95, Assistant Secretary of Defense for Int'l Security Affairs; 1995-2004, Dean, John F Kennedy School of Gov't. Fellow, American Academy of Arts and Sciences. Director, Aspen Strategy Group; Member, Executive Committee, Trilateral Commission; Director, Institute for East-West Security Studies; Director, Int'l Institute for Strategic Studies; American Representative, UN Advisory Committee on Disarmament Affairs; Member, Advisory Committee, Institute of International Economics. Author of books and more than 150 journal articles. Recipient of Distinguished Honour awards.