Paul Kens is associate professor of political science and history at Southwest Texas State University and the author of "Justice Stephen Field: Shaping Liberty from the Gold Rush to the Gilded Age" and "Judicial Power and Reform Politics: The Anatomy of Lochner v. New York", on which this book is based. In 1996 the Supreme Court Historical Society awarded him the Hughes-Gossett Award for Historical Excellence for the best article published in its journal.