Steven HahnSteven Hahn is Professor of History at New York University. A Pulitzer and Bancroft Prize recipient, his most recent book is A Nation Without Borders: The United States and Its World in an Age of Civil Wars, 1830–1910 (2016). Books by the Author Previous slide in carousel Remaking North American Sovereignty Freedom: a Documentary History of Emancipation, 1861-1867 Nothing but Freedom Next slide in carousel