Taking a broad historical perspective, Public Passion traces the role of emotion in political thought from its prominence in classical sources, through its resuscitation by Montesquieu, to the present moment. Combining intellectual history, philosophy, and political theory, Rebecca Kingston develops a sophisticated account of collective emotion that demonstrates how popular sentiment is compatible with debate, pluralism, and individual agency and shows how emotion shapes the tone of interactions among citizens. She also analyzes the ways in which emotions are shared and transmitted among citizens of a particular regime, paying particular attention to the connection between political institutions and the psychological dispositions that they foster. Public Passion presents illuminating new ways to appreciate the forms of popular will and reveals that emotional understanding by citizens may in fact be the very basis through which a commitment to principles of justice can be sustained.