Passion and emotion run deep in politics, but researchers have only recently begun to study how they influence our political thinking. Contending that the long-standing neglect of such feelings has left unfortunate gaps in the understanding of political behavior, this book provides a comprehensive overview of current research on emotion in politics and where it is likely to lead. In sixteen chapters, thirty scholars approach this topic from an array of angles that address four major themes. The first section outlines the philosophical and neuroscientific foundations of emotion in politics, while the second focuses on how emotions function within and among individuals. The final two sections branch out to explore how politics work at the societal level and suggest the next steps in modeling, research, and political activity itself.