Frederick Jackson Turner's 1893 essay on the history of the United States remains one of the most famous and influential works in the American canon.

That is a testament to Turner's powers of creative synthesis; in a few short pages, he succeeded in redefining the way in which whole generations of Americans understood the manner in which their country was shaped, and their own character moulded, by the frontier experience. It is largely thanks to Turner's influence that the idea of America as the home of a sturdily independent people – one prepared, ultimately, to obtain justice...