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Concept
Evolution of languages
Résumé
The evolution of languages or history of language includes the evolution, divergence and development of languages throughout time, as reconstructed based on glottochronology, comparative linguistics, written records and other historical linguistics techniques. The origin of language is a hotly contested topic, with some languages tentatively traced back to the Paleolithic. However, archaeological and written records extend the history of language into ancient times and the Neolithic.
The distribution of languages has changed substantially over time. Major regional languages like Elamite, Sogdian, Koine Greek, or Nahuatl in ancient, post-classical and early modern times have been overtaken by others due to changing balance of power, conflict and migration. The relative status of languages has also changed, as with the decline in prominence of French and German relative to English in the late 20th century.
The highly diverse Nilo-Saharan languages, first proposed as a family by Joseph Greenberg in 1963 might have originated in the Upper Paleolithic. Given the presence of a tripartite number system in modern Nilo-Saharan languages, linguist N.A. Blench inferred a noun classifier in the proto-language, distributed based on water courses in the Sahara during the "wet period" of the Neolithic Subpluvial.
Throughout the 1990s and 2000s, researchers attempted to reconstruct the Proto-Afroasiatic language, suggesting it likely arose between 18,000 and 12,000 years ago in the Levant, suggesting that it may have descended from the Natufian culture and migrated into Africa before diverging into different languages.
Population genetics research in the 2000s suggests that the very earliest predecessors of the Dravidian languages may have been spoken in south-west Iran between 15,000 and 10,000 years ago before spreading to India much later. The Eastern Sudanic group of Nilo-Saharan languages may have unified around 7000 years ago.
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