This report introduces a new assessment framework for legitimacy and illegitimacy that governments, businesses, and other organizations can use to better understand the sources and dynamics of support or opposition for any entity, policy, or program. It includes an intellectual history of the concept of legitimacy, summarizes the literature, introduces a new conceptualization of illegitimacy, and outlines four types of legitimacy assessments, from a rapid to a comprehensive assessment.

Robert D. Lamb is a senior fellow and director of the Program on Crisis, Conflict, and Cooperation at CSIS.