Tamar Mitts is an Associate Professor at the School of International and Public Affairs and a Faculty Member at the Saltzman Institute of War and Peace Studies, the Institute of Global Politics, and the Data Science Institute at Columbia University.

Mitts’s research focuses on how digital platforms and emerging technologies shape conflict, governance, and social change. She studies how militant groups and political actors use digital tools to influence public opinion, mobilize supporters, and manipulate information — and how these dynamics affect security and democracy. Her work also examines nonviolent resistance and activism, exploring how identity, public perceptions, and allyship influence the success of social movements.
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Her articles have been published, or are forthcoming, in top journals including the American Political Science Review, International Organization, PNAS, Journal of Politics, and Perspectives on Politics, among other outlets. Her new book, Safe Havens for Hate: The Challenge of Moderating Online Extremism was published with Princeton University Press in 2025.

Research and Publications