Book excerpt: Constitutionalism: Past, Present, and Future is the definitive collection of Dieter Grimm's most influential writings on constitutional thought and interpretation. The essays included in this volume explore the conditions under which the modern constitution could emerge; they treat the characteristics that must be given if the constitution may be called an achievement, the appropriate way to understand and interpret constitutional law under current conditions, the function of judicial review, the remaining role of national constitutions in a changing world, as well as the possibility of supra-national constitutionalism. Many of these essays have influenced the German and European discussion on constitutionalism and for the first time, much of the work of one of German's leading scholars of public law will be available in the English language.