France did the same thing, although most of its vast territories were far less densely populated.
The eternal, absolute, God-given right to private property dates back to...
The allure of so-called "virgin soil," which acted as a spur for a diverse collection of eccentrics, religious fundamentalists, speculators and aristocratic chancers in the 17th and 18th centuries, was the necessary precursor to manifest destiny.
The 19th century historian Frederick Jackson Turner established the Frontier Thesis in The Significance of the Frontier in American History, which essentially argued that the experience of the frontier created a American mythology - thus in turn creating the conception of American nationhood, which had been closely tied to continental models during its War of Independence.
The only historian come President, Theodore Roosevelt, wrote that the frontier created an "American Race." Manifest destiny not only greatly increased the landmass of the American republic, it effectively created the American ideal.
Without it, the United States would have been vastly different - whether this was for better or for worse is a matter of opinion.
The first, “The Significance of History,” reiterated his belief in what historians call “multiple causation"; to understand man’s complex nature, he insisted, one needed not only a knowledge of past politics, but a familiarity with social, economic, and cultural forces as well.
The second, “Problems in American History,” attempted to isolate those forces most influential in explaining the unique features of American development.
Seeing such historical processes in isolation may lead to a critical failure of perspective.
The American expansion across central continental North America is comparable in scale to the British/Canadian expansion across northern continental North America, the Brazilian conquest of Amazonia, the British/Australian colonization of the interior of Australia, and Russian expansion across northern Eurasia.