This book investigates how the principles of active liberty should guide constitutional interpretation to ensure that the law remains responsive to the needs of a modern democratic society. Stephen G. Breyer, a former Justice of the Supreme Court of the United States, draws upon his extensive judicial experience and legal scholarship to argue against a purely textualist or originalist approach. He proposes a framework that emphasizes the practical consequences of judicial decisions and the importance of public participation in the democratic process. By examining the role of the judiciary, Breyer advocates for an interpretive method that promotes the collective self-governance of the citizenry.

Legal scholars and practitioners frequently cite this work as a foundational text for understanding the pragmatic approach to constitutional law. Experts highlight the clarity of Breyer's arguments, noting that the text serves as a vital resource for those interested in the intersection of judicial philosophy and democratic governance.