Situated at the intersection of International Relations (IR) and international history, this book studies external perceptions of Germany during the 20th century. Images of Germany not only determined how Germans were seen and treated by foreigners. They also influenced the very concepts that scholars and practitioners used to describe and theorise international relations in the English-speaking world. At crucial moments of the 20th century they cited Germany as example, contrast foil or cautionary tale when making more general points about the nature and mechanisms of international politics. The chapters in this volume cover the history of various theoretical approaches in IR including classical realism, liberal internationalism, constructivism and transitional justice. The book will appeal to many scholars and students of IR and history because the German case can serve as a prism to refract Western conceptions of international affairs more generally.