William Cronon argued that this idea was insufficiently connected to the development of markets in his book (*) Nature's Metropolis.
An article by William Appleman Williams connects this idea to a foreign policy advocated by Brooks Adams. The essay which originated this idea expresses agreement with Achille Loria's idea that the study of economic development is aided through the study of colonial life. The "populist" and "progressive" strains of this idea are discussed by Richard Slotkin in the final book of a trilogy which began with the books Regeneration Through Violence and The Fatal Environment. William Cronon argued that this idea was insufficiently connected to the development of markets in his book (*) Nature's Metropolis. The paper that originated this idea was written following the 1890 census, and claims that the "existence of an area of free land, its continuous recession, and the advance of American settlement" explains the development of American democracy. For 10 points, name this idea developed by Frederick Jackson Turner in a paper titled for its namesake boundary's "significance" in American history.
An article by William Appleman Williams connects this idea to a foreign policy advocated by Brooks Adams.
frontier thesis [or Turner thesis before mentioned; accept "The Significance of the Frontier in American History"] 