Marcus DuBois King, Ph.D. is John O. Rankin Associate Professor of International Affairs and Director of the M.A. Program in International Affairs at George Washington University’s Elliott School. His research focuses on environmental security, climate change and security, and water stress in fragile states. Prior to the Elliott School he was a research analyst at CNA Corporation’s Center for Naval Analyses. King’s government service includes presidential appointments during the Clinton Administration in the Office of the Secretary of Energy and the Office of the Deputy Under Secretary for Environmental Security at the Pentagon. He is Senior Fellow at the Center for Climate and Security and the Vice-Chairman of the Council on Strategic Risks.