Peter S. Onuf is the Thomas Jefferson Memorial Foundation Professor of History, University of Virginia. He is the author of Jefferson's Empire: The Language of American Nationhood and coeditor of Sally Hemings and Thomas Jefferson: History, Memory, and Civic Culture.

"Conceptually sophisticated and immensely illuminating."-Journal of American History "He shows a mastery of the sources: primary, secondary, and, most impressively, documentary histories."-William and Mary Quarterly "An important explanation of why the Union was unstable during the early nineteenth century."-Reviews in American History

Peter S. Onuf is the Thomas Jefferson Memorial Foundation Professor of History, University of Virginia. He is the author of Jefferson's Empire: The Language of American Nationhood and coeditor of Sally Hemings and Thomas Jefferson: History, Memory, and Civic Culture.

"Conceptually sophisticated and immensely illuminating."-Journal of American History "He shows a mastery of the sources: primary, secondary, and, most impressively, documentary histories."-William and Mary Quarterly "An important explanation of why the Union was unstable during the early nineteenth century."-Reviews in American History