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A controversial minority view is that of the linguist Joseph Greenberg, who groups all Native American languages other than Eskimo-Aleut and Na-Dene languages into a single large family, termed Amerind, with about a dozen subfamilies.

He discovered that Indians formed “three New World dental clusters” corresponding to Greenberg’s Aleut, Na-Dene, and Amerind.

Health & Science article “Easter Island’s people weren’t alone” stated that South American Amerind DNA in the Easter Island population resulted from islanders bringing people back from South America.

It is not clear why the Chipewyans and others speak a Na-Dene language if most of their DNA is from Amerind speakers.

Polygamy generally prevailed among the Amerinds, and modern civilization is accustomed to regard this as an evil from the standpoint of the woman.