This study was important because it provided a detailed and original account of the political ideology of white southern small farmers.
In 2003 Hahn published his second book A Nation Under Our Feet: Black Political Struggles in the Rural South from Slavery to the Great Migration, which won the 2004 Pulitzer Prize for History.
In 2009 he published The Political Worlds of Slavery and Freedom, a version of the Nathan I. Huggins Lecture he delivered at Harvard University two years earlier.
His latest book, A Nation Without Borders: The United States and Its World in an Age of Civil Wars was published in 2016 by Penguin Press.
Hahn has won a number of teaching awards and has been supported in his research by the Guggenheim Foundation, the American Council of Learned Societies, the Center for Advanced Study in the Behavioral Sciences at Stanford, and the Huntington Library in San Marino, California.