Marcus D. King is Professor of the Practice in Environment and International Affairs at Georgetown University’s Edmund A. Walsh School of Foreign Service, with a joint appointment at Earth Commons, Georgetown’s Institute for Environment & Sustainability. He has previously served as John O. Rankin Associate Professor of International Affairs and Director of the Master of Arts in International Affairs Program at George Washington University. King brings extensive experience from governmental and non-governmental organizations, including the Office of the Secretary of Defense, the Office of the Secretary of Energy, and CNA Corporation. He is Vice Chairman of the Council on Strategic Risks and serves on the Advisory Board of the Center for Climate and Security. His research focuses on environmental security, climate change resilience, and the linkages between environmental change and societal instability in fragile states. His most recent book, Weaponizing Water: Water Stress and Islamist Extremist Violence in Africa and The Middle East (2023), examines the intersections of resource scarcity, conflict, and security.