David M. WrobelDavid M. Wrobel is a Professor of History at the University of Oklahoma. He is the author of Promised Lands (2002), The End of American Exceptionalism (1993), and Global West, American Frontier (2013), which won the Western Heritage Award for nonficton. He is a past president of the Pacific Coast Branch of the American Historical Association and of Phi Alpha Theta, the National History Honor Society. Read More Read Less