Question: Who dropped out of the school that employed the writer of The Significance of the Frontier in American History, and became known by many as the founder of public relations?

<P0-S0> Most textbooks date the establishment of the ``Publicity Bureau ''in 1900 as the start of the modern public relations (PR) profession. <P0-S1> Of course, there were many early forms of public influence and communications management in history. <P0-S2> Basil Clarke is considered the founder of the public relations profession in Britain with his establishment of Editorial Services in 1924. <P0-S3> Academic Noel Turnball points out that systematic PR was employed in Britain first by religious evangelicals and Victorian reformers, especially opponents of slavery. <P0-S4> In each case the early promoters focused on their particular movement and were not for hire more generally. <SEP> <P1-S0> ``The Significance of the Frontier in American History ''is a seminal essay by the American historian Frederick Jackson Turner which advanced the Frontier Thesis of American history. <P1-S1> It was presented to a special meeting of the American Historical Association at the World's Columbian Exposition in Chicago, Illinois in 1893, and published later that year first in Proceedings of the State Historical Society of Wisconsin, then in the Annual Report of the American Historical Association. <P1-S2> It has been subsequently reprinted and anthologized many times, and was incorporated into Turner's 1921 book, The Frontier in American History, as Chapter I. <SEP> <P2-S0> donald worster (born 1941) was the hall distinguished professor of american history at the university of kansas. <P2-S1> he is one of the founders of, and leading figures in, the field of environmental history. <P2-S2> in 2009, he was named to the american academy of arts and sciences. <P2-S3> after retirement from university of kansas, he became distinguished foreign expert and senior professor in the school of history of renmin university of china. <SEP> <P3-S0> jim's restaurants is an american chain of restaurants owned by uptown san antonio, texas-based frontier enterprises. <P3-S1> jim's, most well known for its breakfast and charbroiled frontier burgers, was started in 1947 when founder g. jim hasslocher built his first burger stand. <P3-S2> the burger stand grew and became a drive-in burger concept with carhops, which eventually led to full-service restaurants in several locations. <P3-S3> prior to 1980, the restaurant chain expanded into the houston metro area until frontier withdrew and sold off the houston locations. <P3-S4> as of april 2010, frontier operates 16 locations in the san antonio area and 3 in austin. <SEP> <P4-S0> Frederick Jackson Turner (November 14, 1861 – March 14, 1932) was an American historian in the early 20th century, based at the University of Wisconsin until 1910, and then at Harvard. <P4-S1> He was primarily known for his “Frontier Thesis.” He trained many PhDs who came to occupy prominent places in the history profession. <P4-S2> He promoted interdisciplinary and quantitative methods, often with a focus on the Midwest. <P4-S3> He is best known for his essay "The Significance of the Frontier in American History", whose ideas formed the Frontier Thesis. <P4-S4> He argued that the moving western frontier shaped American democracy and the American character from the colonial era until 1890. <P4-S5> He is also known for his theories of geographical sectionalism. <P4-S6> In recent years historians and academics have argued strenuously over Turner's work; all agree that the Frontier Thesis has had an enormous impact on historical scholarship and the American soul.