Michael Grossberg is the Sally M. Reahard Professor of History and a Professor of Law at Indiana University, where he is also co-director of the Indiana University Center on Law, Society, and Culture. He is the author of numerous articles and books, including Governing the Hearth, Law, and the Family in Nineteenth-Century America, winner of the American Historical Association's 1985 Littleton-Griswold Prize. His research focuses on the relationship between law and social change, particularly the intersection of law and the family. Christopher Tomlins is Senior Research Fellow at the American Bar Foundation in Chicago. Among other books, he is author of Law, Labor and Ideology in the Early American Republic, winner of the James Willard Hurst book prize of the Law and Society Association and of the American Historical Association's Littleton-Griswold prize, both in 1994. His research encompasses the relationship between labor, colonization, and law in early America, the history of the concept of police in Anglo-American law and politics and the historical interactions of law and social science.