The Frontier Thesis, also known as Turner's Thesis or American frontierism, is an argument presented by historian Frederick Jackson Turner in 1893 that the settlement and colonization of the rugged American frontier was decisive in forming a culture of American democracy distinct from European nations.

First published in "The Significance of the Frontier in American History", a paper delivered to the American Historical Association in Chicago, the thesis held that American culture was shaped by the pioneers' work in "winning a wilderness", which instilled discipline, self-sufficiency, and a break from the settled, deferential culture that emerged from European feudalism. Turner used ideas related to manifest destiny to explain various aspects of it: democracy, egalitarianism, and a disinterest in bourgeois or high culture, and an ever-present potential for violence. He wrote, "American democracy was born of no theorist's dream...It came out of the American forest, and it gained new strength each time it touched a new frontier."

Turner elaborated on the theme in lectures and a series of essays published over the next 25 years, published along with his initial paper as The Frontier in American History.Turner, The Frontier in American History (1920) chapter 1 He won wide acclaim among historians and intellectuals and influenced thousands of scholarly histories. By the time Turner died in 1932, 60% of the leading history departments in the U.S. were teaching courses in frontier history along Turnerian lines.Allan G. Bogue, "Frederick Jackson Turner Reconsidered," The History Teacher, (1994) 27#2 pp. 195–221 , It was not confined to academia, but was a popular and accepted view. President John F. Kennedy described his programs in the 1960 election as a "New Frontier" to conquer, meaning space and domestic issues. While this view remains reasonably common at a popular level, academic historians have since the 1980s increasingly discounted the Frontier Thesis.

Summary Turner begins "The Significance of the Frontier in American History" by noting that the western frontier had ended.

According to Turner, American progress has repeatedly undergone a cyclical process on the frontier line as society has needed to redevelop with its movement westward. Everything in American history up to the 1880s somehow relates to the western frontier, including slavery. In spite of this, Turner laments, the frontier has received little serious study from historians and economists. The frontier line, which separates civilization from wilderness, is “the most rapid and effective Americanization” on the continent; it takes the European from across the Atlantic and shapes him into something new. American emigration west is not spurred by government incentives, but rather some "expansive power" inherent within them that seeks to dominate nature. Furthermore, there is a need to escape the confines of the state.

The most important aspect of the frontier to Turner is its effect on democracy. The frontier transformed Jeffersonian democracy into Jacksonian democracy. The individualism fostered by the frontier's wilderness created a national spirit complementary to democracy, as the wilderness defies control. Therefore, Andrew Jackson's brand of popular democracy was a triumph of the frontier. Turner sets up the East and the West as opposing forces; as the West strives for freedom, the East seeks to control it. He cites British attempts to stifle western emigration during the colonial era as an example of eastern control. Even after independence, the eastern coast of the United States sought to control the West. Religious institutions from the eastern seaboard, in particular, battled for possession of the West. The tensions between small churches as a result of this fight, Turner states, exist today because of the religious attempt to master the West.

American intellect owes its form to the frontier as well. The traits of the frontier are "coarseness and strength combined with acuteness and inquisitiveness; that practical, inventive turn of mind, quick to find expedients; that masterful grasp of material things, lacking in the artistic but powerful to effect great ends; that restless, nervous energy; that dominant individualism, working for good and for evil, and withal that buoyancy and exuberance which comes with freedom." Turner concludes the essay by saying that with the end of the frontier, the first period of American history has ended.

Intellectual context Germanic germ theory The Frontier Thesis came about at a time when the Germanic germ theory of history was popular. Proponents of the germ theory believed that political habits are determined by innate racial attributes. Americans inherited such traits as adaptability and self-reliance from the Germanic peoples of Europe. According to the theory, the Germanic race appeared and evolved in the ancient Teutonic forests, endowed with a great capacity for politics and government. Their germs were, directly and by way of England, carried to the New World where they were allowed to germinate in the North American forests. In so doing, the Anglo-Saxons and the Germanic people's descendants, being exposed to a forest like their Teutonic ancestors, birthed the free political institutions that formed the foundation of American government.

Historian and ethnologist Hubert Howe Bancroft articulated the latest iteration of the Germanic germ theory just three years before Turner's paper in 1893. He argued that the "tide of intelligence" had always moved from east to west. According to Bancroft, the Germanic germs had spread across of all Western Europe by the Middle Ages and had reached their height. This Germanic intelligence was only halted by "civil and ecclesiastical restraints" and a lack of "free land." This was Bancroft's explanation for the Dark Ages.

Turner's theory of early American development, which relied on the frontier as a transformative force, opposed Bancroftian racial determinism. Turner referred to the Germanic germ theory by name in his essay, claiming that “too exclusive attention has been paid by institutional students to the Germanic origins.” Turner believed that historians should focus on the settlers’ struggle with the frontier as the catalyst for the creation of American character, not racial or hereditary traits.

Though Turner's view would win over the Germanic germ theory's version of Western history, the theory persisted for decades after Turner's thesis enraptured the American Historical Association. In 1946, medieval historian Carl Stephenson published an extended article refuting the Germanic germ theory. Evidently, the belief that free political institutions of the United States spawned in ancient Germanic forests endured well into the 1940s.

Racial warfare A similarly race-based interpretation of Western history also occupied the intellectual sphere in the United States before Turner. The racial warfare theory was an emerging belief in the late nineteenth century advocated by Theodore Roosevelt in The Winning of the West. Though Roosevelt would later accept Turner's historiography on the West, calling Turner's work a correction or supplementation of his own, the two certainly contradict. Roosevelt was not entirely unfounded in saying that he and Turner agreed; both Turner and Roosevelt agreed that the frontier had shaped what would become distinctly American institutions and the mysterious entity they each called “national character.” They also agreed that studying the history of the West was necessary to face the challenges to democracy in the late 1890s.

Turner and Roosevelt diverged on the exact aspect of frontier life that shaped the contemporary American. Roosevelt contended that the formation of the American character occurred not with early settlers struggling to survive while learning a foreign land, but “on the cutting edge of expansion” in the early battles with Native Americans in the New World. To Roosevelt, the journey westward was one of nonstop encounters with the “hostile races and cultures” of the New World, forcing the early colonists to defend themselves as they pressed forward. Each side, the Westerners and the native savages, struggled for mastery of the land through violence. Whereas Turner saw the development of American character occur just behind the frontier line, as the colonists tamed and tilled the land, Roosevelt saw it form in battles just beyond the frontier line. In the end, Turner's view would win out among historians, which Roosevelt would accept.

Evolution

Turner set up an evolutionary model (he had studied evolution with a leading geologist, Thomas Chrowder Chamberlin), using the time dimension of American history, and the geographical space of the land that became the United States.Sharon E. Kingsland, The Evolution of American Ecology, 1890–2000 (2005) p. 133William Coleman, "Science and Symbol in the Turner Frontier Hypothesis," American Historical Review (1966) 72#1 pp. 22–49 The first settlers who arrived on the east coast in the 17th century acted and thought like Europeans. They adapted to the new physical, economic and political environment in certain ways—the cumulative effect of these adaptations was Americanization.

Successive generations moved further inland, shifting the lines of settlement and wilderness, but preserving the essential tension between the two. European characteristics fell by the wayside and the old country's institutions (e.g., established churches, established aristocracies, standing armies, intrusive government, and highly unequal land distribution) were increasingly out of place. Every generation moved further west and became more American, more democratic, and more intolerant of hierarchy. They also became more violent, more individualistic, more distrustful of authority, less artistic, less scientific, and more dependent on ad-hoc organizations they formed themselves. In broad terms, the further west, the more American the community.Ray Allen Billington, America's Frontier Heritage (1974)

Closed frontier Turner saw the land frontier was ending, since the U.S. Census of 1890 had officially stated that the American frontier had broken up. By 1890, settlement in the American West had reached sufficient population density that the frontier line had disappeared; in 1890 the Census Bureau released a bulletin declaring the closing of the frontier, stating: "Up to and including 1880 the country had a frontier of settlement, but at present the unsettled area has been so broken into by isolated bodies of settlement that there can hardly be said to be a frontier line. In the discussion of its extent, its westward movement, etc., it can not, therefore, any longer have a place in the census reports." However, Turner argued that as the North American frontier was ending, a new frontier would have to be pursued, because the country could not maintain its self-concept of being a nation based on ideals without some kind of savage 'other' to contend with. To this end, he claimed that the rising American influence in the Asia-Pacific constituted a new frontier.

Comparative frontiers