In this book, Alec Stone Sweet and Jud Mathews delve into the law and politics of rights protection in democracies, focusing on human rights regimes in Europe, the Americas, and Africa. After introducing the essential features of modern constitutions—emphasizing rights and judicial review—the authors present a comprehensive theory of proportionality that elucidates why constitutional judges have adopted this method. Proportionality analysis allows state officials to limit rights when necessary to achieve significant public interests, making it a highly intrusive form of judicial supervision. Since the 1950s, nearly every major domestic and international court has incorporated proportionality analysis as central in protecting rights, positioning judges to review all important legislative and administrative decisions and invalidate them if they fail the proportionality test. This transformation has had global implications for law and politics.

The book explores key concepts such as ‘trusteeship,’ the ‘system of constitutional justice,’ the ‘effectiveness’ of rights adjudication, and the ‘zone of proportionality.’ Through a diverse range of case studies, it examines how proportionality has spread across different jurisdictions, variations in its deployment, the evolution of U.S. Supreme Court doctrines, the role of proportionality in fostering ongoing ‘constitutional dialogues’ with other branches of government, and its significance to regional human rights regimes. While there is variability in the intensity of these interactions, such dialogue today forms the core of governance within modern constitutional states.

Read more about how this global shift towards proportionality-based governance has transformed the way we understand and apply constitutional law.