In ancient Greece the priests of Apollo asserted that freedom of movement was one of the essentials of human freedom. Many hundreds of years later, toward the end of the eighteenth century, people in the Atlantic world again talked of emigration as one of man's natural rights. It was in northern and western Europe that easier mobility was first achieved within the various states. The next step was to use that mobility to leap local boundaries to reach the lands across the western sea. From the “unsettlement of Europe” (Lewis Mumford's phrase) came the settlement of America.
Americans and those who wished to become Americans felt at home in the geographical realm conceived by Oscar Wilde. “A map of the world that does not include Utopia,” he said, “is not even worth glancing at, for it leaves out the one country at which Humanity is always landing. Progress is the realization of Utopias.” It was the belief that Utopias were being realized in America that caused millions to leave Europe for homes overseas.
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A Scottish observer, Alexander Irvine, inquiring into the causes and effects of emigration from his native land (1802), remarked that there were “few emigrations from despotic countries,” as “their inhabitants bore their chains in tranquility”; “despotism has made them afraid to think.” Nevertheless, though proud of the freedom his countrymen enjoyed, Irvine was critical of their irrational expectations in setting forth to America. There were few individuals or none in the Highlands, he said, “who have not some expectation of being some time great or affluent.