A. L. Kroeber,
Anthropology
(1923)
“ One area alone, the Northwest Coast, was reached but imperfectly by Middle American influences, yet attained a tolerable development through its own creative force, supplemented in some measure by the drift into it of sporadic culture element migrants from Asia. Here only, then, there occurred a markedly independent growth of civilization, though definitely secondary to the great evolution of Middle America which in the main determined the culture of the twin continents. ”
