His research interests are in the history of war, politics, and citizenship in modern American history. His first book, Uncle Sam Wants You: World War I and the Making of the Modern American Citizen (Oxford University Press, 2008), examines the relationship between citizens, voluntary associations, and the federal government during World War I through explorations of military conscription and conscientious objection, homefront voluntarism, regulation of enemy aliens, and the emergence of civil liberties movements. In 2010, Uncle Sam Wants You won the Lois P. Rudnick Book Prize of the New England American Studies Association.
