What are antagonistic political emotions, and what do they do? This book explores how such emotions unfold within and shape the political sphere. By driving and reinforcing identities, political emotions deepen divisions and empower feelings of hatred but also establish allegiance and belonging. Contributions from leading philosophers, political theorists, and social psychologists uncover the broad range of emotions animating contemporary political life and reveal how they impact political identities while also generating both solidarity and division. The chapters trace how antagonistic emotions manifest across diverse contexts, from climate activism and online extremism to electoral politics and everyday civic engagement. The cutting-edge perspectives on the emotional foundations of political life make this volume essential reading for those seeking to understand what propels political behaviour in our polarised age. Challenging traditional binaries of positive versus negative emotions, the book shows how antagonistic feelings place us simultaneously for, against, and together.