Frederick Jackson Turner examines the profound role of the Ohio Valley and its surrounding geographic provinces in the historical development of the United States. The text begins by establishing the concept of sectionalism as a fundamental framework for understanding American history, contrasting the vast natural empire of the North American continent with the centralized forces of the federal government. Turner delineates how the Ohio Valley served as a natural highway, a strategic military wedge, and a middle kingdom bridging the industrial East, the agricultural West, and the plantation South. The author traces the genesis of the backwoods society that peopled the valley from the upland regions of Pennsylvania and the southern interior, highlighting the unique blend of Scotch-Irish, German, and English settlers whose democratic impulses and emotional religious fervor contrasted sharply with coastal conservatism.
Through successive waves of migration, this frontier society pushed across the mountains, establishing new commonwealths, struggling against native resistance, and laying the groundwork for a distinct sectional consciousness. The narrative further explores the economic evolution of the region, from simple self-sufficing agriculture and primitive river transport to a highly systematized industrial powerhouse connected by the Great Lakes and continental railroads. Turner evaluates the crucial influence of these western states in national politics, particularly regarding the struggle over slavery, the Homestead Act, and the rise of populist movements that challenged eastern capital. Ultimately, the work demonstrates how the dynamic tension between provincial identity and national consolidation forged the political and social ideals of modern America, leaving a legacy of individualism, freedom of opportunity, and democratic aspiration.
