Why was "the significance of the frontier life in american history" so

Question: Why was "the significance of the frontier life in american history" so controversial!?

this is a question that one of my american history class is asking!.
are there any frontiers still apparent in america today!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Turner's basic thesis is not all that controversial!. Westward expansion has clearly played the central role in the development of American culture and psyche, and very few historians would argue that it hasn't!?

What is controversial is the way that Americans went about that expansion, especially the genocide of the native population of the Americas!.

As to frontiers today, Space (the final frontier); medical and technological discoveries; eliminating racism, sexism and other prejudicies!. There will always be something Americans are striving for --- it's our basic nature!.Www@QuestionHome@Com