Gregory Treverton just completed service as chairman of the National Intelligence Council, which provides both strategic intelligence and more immediate intelligence support to the senior foreign policymakers in the U.S. government. Earlier, he directed the RAND Corporation’s Center for Global Risk and Security, and before that its Intelligence Policy Center and its International Security and Defense Policy Center, and he was associate dean of the Pardee RAND Graduate School. He has served earlier in government for the first Senate Select Committee on Intelligence, handling Europe for the National Security Council and as vice chair of the National Intelligence Council, overseeing the writing of America’s National Intelligence Estimates (NIEs). He has taught at Harvard and Columbia universities, in addition to RAND, been a Senior Fellow at the Council on Foreign Relations, and Deputy Director of the International Institute for Strategic Studies in London. He holds an A. B. summa cum laude from Princeton University and an M.P.P (Master’s in Public Policy) and Ph.D. in economics and politics from Harvard. His latest books are Dividing Divided States, University of Pennsylvania Press, 2014; and Beyond the Great Divide: Relevance and Uncertainty in National Intelligence and Science for Policy, (with Wilhelm Agrell), Oxford University Press, 2015.