The MIT Press Reader presents excerpts from a new book with a theory of how language evolved (yes, yet another one); here’s the introduction:
In their book “From Signal to Symbol,” Ronald Planer and Kim Sterelny propose a novel theory of language: that modern language is the product of a long series of increasingly rich protolanguages evolving over the last two million years. Arguing that language and cognition coevolved, they give a central role to archaeological evidence and attempt to infer cognitive capacities on the basis of that evidence, which they link in turn to communicative capacities.
If protolanguages began as largely gestural systems, Planer and Sterelny ask in the excerpt from the book featured below, why and how did vocalization become so important? They meet that challenge through the idea of a “firelight niche” — a term adapted from a phrase used by anthropologist Polly Wiessner in a 2014 article analyzing the fireside conversations of the Ju/’hoan (!Kung) Bushmen of South Africa — and the changed social and physical environments that came with the control of fire. In their view, selection for something like wordless singing and laughter led to improved vocal control. These behaviors helped to ease tensions and strengthen affiliative bonds as hominin social life became more complex and intense. With more vocal control available, the vocal channel offered various efficiencies, which were particularly salient at the fireside, in the firelight niche.
–The Editors
The excerpts themselves begin with an excursus on the contrasts between humans and great apes in feeding time (“Chimpanzees and orangutans, it is estimated, spend around 7 hours per day feeding, while gorillas spend some 8.8 hours per day on this activity”), then continues:
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