Jennifer Guglielmo is Assistant Professor of History at Smith College. Salvatore Salerno is an independent scholar who has taught at University of Massachusetts at Boston, California State University at Sacramento, and Macalester College. David Roediger (afterword) is the Kendrick Babcock Professor of History at the University of Illinois and the author of many books, including Wagesof Whiteness: Race and the Making of the American WorkingClass.