hhan at wellesley dot edu | 781-283-2140 | twitter @hahriehan 

I am a political scientist interested in civic associations, civic engagement, engagement organizing, political activism, and health and environmental politics.

I have also studied political polarization, congressional elections, interest groups, social movements, and other topics.  My research has appeared in the American Sociological Review, American Journal of Sociology, and other journals.

I have written three books: How Organizations Develop Activists: Civic Associations and Leadership in the 21st CenturyGroundbreakers: How Obama's 2.1 Million Activists Transformed Field Campaigns in America, and Moved to Action: Motivation, Participation, and Inequality in American Politics.