Turner did not publish extensively; his influence came from tersely expressed interpretive theories in his articles, which influenced his hundreds of disciples. Two theories, in particular, were influential, the "Frontier Thesis" and the "Sectional Hypothesis". Although he published little, he had an encyclopedic knowledge of American history, earning a reputation by 1910 as one of the two or three most influential historians in the country. He proved adept at promoting his ideas and his students, for whom he obtained jobs in major universities, including
Merle Curti and
Marcus Lee Hansen. He circulated copies of his essays and lectures to important scholars and literary people, published extensively in magazines, recycled favorite material, attaining the largest possible audience for major concepts, and wielded considerable influence within the
American Historical Association as an officer and advisor for
The American Historical Review. His emphasis on the importance of the frontier in shaping American character influenced the interpretation found in thousands of scholarly histories. By the time Turner died in 1932, 60% of the major history departments in the U.S. were teaching courses in frontier history compatible with Turner's theories. Annoyed by the university regents who demanded less research and more teaching and state service, Turner sought an environment that would permit him to do more research. Declining offers from the
University of California, he accepted an offer from
Harvard University in 1910 and remained a professor there until 1922, and in 1911 he was elected a fellow of the
American Academy of Arts and Sciences. Turner was never comfortable at Harvard; when he retired in 1922 he became a visiting scholar at
the Huntington Library in Los Angeles, where his note cards and files continued to accumulate, although few monographs got published. His
The Frontier in American History (1920) was a collection of older essays. As a professor of history at the
University of Wisconsin from 1890 to 1910 and Harvard from 1910 to 1922, Turner trained scores of disciples who, in turn, dominated American history programs throughout the country. His model of sectionalism as a composite of social forces, such as ethnicity and land ownership, encouraged historians to use social history to analyze social, economic and political developments of American history. At the
American Historical Association, he collaborated with
J. Franklin Jameson on numerous major projects. Turner's theories became unfashionable during the 1960s, as critics complained that he neglected regionalism. They complained that he claimed too much egalitarianism and democracy for a frontier that was restrictive for women and minorities. After Turner's death his former colleague Isaiah Bowman had this to say of his work: "Turner's ideas were curiously wanting in evidence from field studies...He represents a type of historian who rests his case on documents and general impression rather than a scientist who goes out for to see." His ideas were never forgotten; indeed they influenced the new field of
environmental history. Turner gave a strong impetus to quantitative methods, and scholars using new statistical techniques and data sets have, for example, confirmed many of Turner's suggestions about population movements. Turner believed that because of his own biases and the amount of conflicting historical evidence that any one method of historical interpretation would be insufficient, that an interdisciplinary method was the most accurate way to analyze history. ==Works==