Turner's main argument in "The Significance of the Frontier in American

History" was that the frontier was significant:

Turner's main argument in "The Significance of the Frontier in American

History" was that the frontier was significant in American history. The purpose of "The Significance of the Frontier in American

History" is to explain not only the significance of the frontier on the development of America and Americans, but also to emphasize that the disappearance of the frontier marks the close of the first major chapter in American history.