Comment on Law and Versteeg

David Law and Mila Versteeg have used their considerable legal and empirical skills to identify what they provocatively describe as the “declining influence of the U.S. Constitution,” or of what they sometimes call “American constitutionalism.”1 This claim has been headline-grabbing in important part because of the larger sociolegal context, in which the question of American hegemony in the world of global politics and economics is deeply unsettled. Declining influence in the design of constitutions thus resonates with a larger set of anxieties about the role of the United States in the world. An alternative to seeing greater variations among constitutional instruments as a sign of decline in the influence of the U.S. Constitution within a framework of power hierarchy and competition,2 is instead to see the increased variations in a framework of evolution and diffusion, and as a sign of the success—not the failure— of the U.S. constitutionalist project. To read “decline” into greater variation may, then, be simply a reflection of anxieties in other spheres, rather than a troublesome development in its own right. In the rest of this comment, I offer brief thoughts on the influence of the U.S. Constitution and on the challenges of accurately and completely tracking such influence. I close with some questions about whether and why influence matters.