Book excerpt: Jürgen Habermas is one of the most influential philosophers of our time. His diagnoses of contemporary society and concepts such as the public sphere, communicative rationality, and cosmopolitanism have influenced virtually all academic disciplines, spurred political debates, and shaped intellectual life in Germany and beyond for more than fifty years. In The Habermas Handbook, leading Habermas scholars elucidate his thought, providing essential insight into his key concepts, the breadth of his work, and his influence across politics, law, the social sciences, and public life. This volume offers a comprehensive overview and an in-depth analysis of Habermas’s work in its entirety. After examining his intellectual biography, it goes on to illuminate the social and intellectual context of Habermasian thought, such as the Frankfurt School, speech-act theory, and contending theories of democracy. The Handbook provides an extensive account of Habermas’s texts, ranging from his dissertation on Schelling to his most recent writing about Europe. It illustrates the development of his thought and its frequently controversial reception while elaborating the central ideas of his work. The book also provides a glossary of key terms and concepts, making the complexity of Habermas’s thought accessible to a broad readership.