"Reacting and Shaping" is a comprehensive academic book that explores the political and social structure of the Roman Empire. The author, Sebastian Schmidt-Hofner, analyzes various aspects of imperial service, tax policy, and agricultural policy to provide a deep understanding of governance and the associated challenges. The book is divided into several chapters that address topics such as the governing style of the emperors, the role of subjects, reforms in the tax system, and currency reform. It offers a detailed examination of imperial constitutions and their normative character, as well as the interactions between state power and the duties of citizens. With a wealth of historical examples and a well-founded analysis, the reader is introduced to the complex world of Roman administration and society.