The United States 1830-1850As Crane Brinton wrote in the Christian Science Monitor at the time of its publication, This is the long awaited master work of a man who must certainly figure in any list of great American historians. Turner was interested in the two decades between 1830 and 1850 because he felt they constituted a distinct era in which regional geography played a significant role in the development of the country. Whether we consider politics, inventions, industrial