Frederick Jackson Turner,
The Frontier in American History…
(1921)
“ The future alone can disclose how far these interpretations are correct for the age of colonization which came gradually to an end with the disappearance of the frontier and free land. It alone can reveal how much of the courageous, creative American spirit, and how large a part of the historic American ideals are to be carried over into that new age which is replacing the era of free lands and of measurable isolation by consolidated and complex industrial development and by increasing resemblances and connections between the New World and the Old. ”
