Hahrie Han is the inaugural director of the Stavros Niarchos Foundation Agora Institute and a professor of political science at Johns Hopkins University. She specializes in the study of civic and political participation, collective action, organizing, and social change, focusing particularly on the role civic associations play in mobilizing participation in politics and building power for social and political change. Her research focuses particularly on social policy, environmental issues, and democratic revitalization. Her most recent book, How Organizations Develop Activists: Civic Associations and Leadership in the 21st Century (Oxford University Press, 2014), examines the strategies that the most effective civic associations use to engage activists and develop leaders in health and environmental politics. Her work has been published in various journals, including the American Sociological Review, American Political Science Review, British Journal of Political Science, and Legislative Studies Quarterly.