Nineteenth and twentieth-century U.S. history, and the history of maps.
Ph.D., University of Pennsylvania, 1995
B.A. University of California at Berkeley, 1989
I came to the University of Denver in 1996 after completing my dissertation under the direction of Bruce Kuklick at the University of Pennsylvania. I teach a range of courses in United States history, including the Civil War and Reconstruction, Lincoln, American intellectual and cultural history, War and the Presidency, the Great Depression, the culture and politics of the Cold War, the American west, and historiography.
My latest book, Mapping the Nation (Chicago), examines the new types of cartography that flourished in nineteenth-century America.
My first book, The Geographical Imagination in America, 1880-1950 (Chicago), examined the place of geographical knowledge in American life during the nation's rise to international stewardship.
I also have an abiding interest in Lincoln and the Civil War, and contribute to the New York Times' "Disunion" series on the sectional crisis. In 2010 I was awarded a John Simon Guggenheim Foundation grant to advance my research on thematic mapping.
You can find more of my research here.