Diffusionism Reconsidered: Linguistic and Archaeological Evidence for Prehistoric Polynesian Contact with Southern California

While the prevailing theoretical orthodoxy of North American archaeology overwhelmingly discourages consideration of transoceanic cultural diffusion, linguistic and archaeological evidence appear to indicate at least one instance of direct cultural contact between Polynesia and southern California during the prehistoric era. Three words used to refer to boats - including the distinctive sewn-plank canoe used by Chumashan and Gabrielino speakers of the southern California coast - are odd by the phonotactic and morphological standards of their languages and appear to correlate with Proto-Central Eastern Polynesian terms associated with woodworking and canoe construction. Chumashan and Gabrielino speakers seem to have borrowed this complex of words along with the sewn-plank construction technique itself sometime between ca. A.D. 400 and 800, at which time there is also evidence for punctuated adaptive change (e.g., increased exploitation of pelagic fish) and appearance of a Polynesian style two-piece bone fishhook in the Santa Barbara Channel. These developments were coeval with a period of major exploratory seafaring by the Polynesians that resulted in the discovery and settlement of Hawaii - the nearest Polynesian outpost to southern California. Archaeological and ethnographic information from the Pacific indicates that the Polynesians had the capabilities of navigation, boat construction, and sailing, as well as the cultural incentives to complete a one-way passage from Hawaii to the mainland of southern California. These findings suggest that diffusion and other forms of historical contingency still need to be considered in constructions of North American prehistory.