Margaret Crosby-Arnold received her Ph.D. from Brown University in 2001, specializing in the fields of Modern German, Modern European and American histories, with a particular interest in comparative constitutionalism and legal development. Between 2001 and 2004, she was an AHRC Research Fellow on the project "Constituting the German Nation: The Construction of Citizenship through Constitutional Theory and Practice 1898-1998," at King's College-London. In addition, she was awarded two Guest Scientist appointments with the Max Planck Institute for European Legal History in Frankfurt, Germany. In 2009, she was advanced to Associate Professor with tenure and is currently a Visiting Scholar in the Department of History at Columbia University. She is the author of The Making of a German Constitution: A Slow Revolution, which appeared in 2008. Her second book, Hannibals At The Gates: Europe's First Immigration Crisis and the Rise of the Legal Fiction of Race during the French Revolutionary and Napoleonic Era, 1750-1815 will be published by Berghahn Books in 2013. With an eye toward Europe's current immigration crisis, the book examines the relationship between modern constitutionalism and the construction of race in the late-eighteenth and early-nineteenth century Europe, with a particular focus on reactions against the mobility, social mobility and integration of people of color in Europe in the second half of the Eighteenth Century. Dr. Crosby has given numerous talks in the United States, Europe and Asia and, has, additionally, served on a number of public boards and commissions.