When1: 1963
When2: 1987
Who: Joseph Greenberg [Greenberg, Joseph]
What: linguist
Where: USA
works\ Studies in African Linguistic Classification [1955]; Universals of Language [1963: editor]; Languages of Africa [1963]; Language in the Americas [1987]
Detail: He lived 1916 to 2001 and classified world languages [1963] into four families: Niger-Kordofanian, Nilo-Saharan, Afro-Asiatic, and Khoisan. People came to Americas from Asia in three separate waves with different languages {Greenberg Theory}: Amerind, Eskimo-Aleut, and Na-Dene.
Social Sciences>Linguistics>History
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Date Modified: 2022.0224