Charles L. Glaser is a Senior Fellow in the MIT Security Studies Program and Professor Emeritus of Political Science and International Affairs at George Washington University. He was the Founding Director of the Elliott School's Institute for Security and Conflict Studies.

Glaser studies international relations theory and international security policy. His research focuses on defensive realism and deterrence theory, as well as U.S. security policy regarding China, nuclear weapons, and energy security.

His books include Retrench, Defend, Compete: Securing America’s Future Against a Rising China, Rational Theory of International Politics and Analyzing Strategic Nuclear Policy; and two co-edited volumes—Managing U.S. Nuclear Operations in the 21st Century and Crude Strategy.