Adam ArensonAdam Arenson is Associate Professor of History and Director of Urban Studies at Manhattan College, author of The Great Heart of the Republic: St. Louis and the Cultural Civil War (2011), and coeditor of Frontier Cities: Encounters atthe Crossroads of Empire (2013).

Andrew R. Graybill is Professor of History and Director of the William P. Clements Center for Southwest Studies at Southern Methodist University, author of Policing the Great Plains: Rangers, Mounties, and the North American Frontier, 1875-1910 (2007), and coeditor of Bridging National Borders in North America: Transnational and Comparative Histories (2010). Read More Read Less