The continuation of westward expansion naturally came at the further expense of the American Indians. The sociocultural environment of “young America” offered fresh rationales for the dispossession of Native Americans; the broadening of federal power provided administrative machinery to carry it out; and the booming economy spurred the demand to bring ever more “virgin land” still in Indian hands into the orbit of “civilization.”
After 1815, control of Indian affairs was shifted from the State Department to the War Department (and subsequently to the Department of the Interior, created in 1849.) The Indians were no longer treated as peoples of separate nations but were considered wards of the United States, to be relocated at the convenience of the government when necessary. The acquisition of the Louisiana Territory in 1803 and Florida in 1819 removed the last possibilities of outside help for the Indians from France or Spain; moreover, they opened new areas for “resettlement” of unassimilable population elements.
That a policy of “population transfer” foreshadowing some of the later totalitarian infamies of the 20th century should be so readily embraced in democratic 19th-century America is comprehensible in the light of cultural forces. The revival-inspired missionary movement, while Native American-friendly in theory, assumed that the cultural integrity of Indian land would and should disappear when the Indians were “brought to Christ.” A romantic sentimentalization of the “noble red man,” evidenced in the literary works of James Fenimore Cooper and Henry Wadsworth Longfellow, called attention to positive aspects of Indian life but saw Native Americans as essentially a vanishing breed. Far more common in American thought was the concept of the “treacherous redskin,” which lifted Jackson and William Henry Harrison to the presidency in 1828 and 1840, respectively, partly on the strength of their military victories over Indians. Popular celebration of allegedly Anglo-Saxon characteristics of energy and independence helped to brand other “races”—Indians as well as Africans, Asians, and Hispanics—as inferiors who would have to yield to progress. In all, the historical moment was unkind to the Indians, as some of the values that in fact did sustain the growth and prosperity of the United States were the same ones that worked against any live-and-let-live arrangement between the original Americans and the newcomers.
Attitudes toward expansionism