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Merrill et al. (1) propose 8900 BP as the latest date Proto-Uto-Aztecan (PUA) was spoken. Based on negative reconstructive evidence, they argue for a PUA homeland in the US Great Basin, observing that “a significant decrease in effective moisture” beginning in 6900 BC motivated bands to leave the region, leading to the language's breakup. Given a Great Basin homeland, such a very early date is a prerequisite to their proposal of a Southern Uto-Aztecan group-to-group diffusion of maize from Mesoamerica to the US Southwest.
Their highly speculative date is discordant with linguistic …
1E-mail: chbrown{at}niu.edu.
Lack of linguistic support for Proto-Uto-Aztecan at 8900 BP
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