Capitalism. Since receiving her doctorate in history at Yale University in 2006, she has been a Visiting Scholar at the American Academy of Arts and Sciences in Cambridge and at the Harvard Divinity School. Her first book, To Serve God and Wal-Mart: The Making of Christian Free Enterprise (Harvard University Press, 2009) won the Frederick Jackson Turner Prize for best first book in U.S. history and the John Hope Franklin Award for the best book in American Studies. She is a founding member of the Tepoztlán Institute for the Transnational History of the Americas and a founding faculty member of Freedom University, which offers college coursework without charge to qualified Georgia high school graduates regardless of immigration status.