"This book focuses on Supreme Court justice Louis D. Brandeis and his opinion in the 1938 landmark case Erie Railroad Co. v. Tompkins, which resulted in a significant relocation of power from federal to state courts. Distinguished legal historian Edward A. Purcell, Jr., shows how the Erie case provides a window on the legal, political, and ideological battles over the federal courts in the New Deal era. Purcell also offers an in-depth study of Brandeis's constitutional jurisprudence and evolving legal views."--BOOK JACKET.