“Polyphonic Federalism is a very interesting and important book, proposing a provocative new conception of federalism in the United States. It will make a very important contribution to the current discussion of the functioning of, and the purposes behind, our system of constitutional federalism.”

Robert Williams, Distinguished Professor, Rutgers School of Law

"A brilliant book that offers a sophisticated new theory of federalism. Professor Schapiro’s approach—polyphonic federalism—defends having a multitude of actors working to enhance freedom and provide effective governance. Supreme Court justices, federal judges, legislators, and academics all should pay careful attention to this path breaking work."

Erwin Chemerinsky, Dean and Distinguished Professor of Law, University of California, Irvine, School of Law

“Schapiro is joining a group of scholars exploring dimensions of federalism that have not been sufficiently in focus.  His contribution enables us to see facets of doctrine and practices that remind us that our system is better described as ‘federalisms’—pluralized to capture the differing relationships among states and the federal government and across the states themselves.”

Judith Resnik, Arthur Liman Professor of Law, Yale Law School