"If the rewiring of the brain that yielded recursive generation of hierarchically structured expressions took place in an individual, not a group (and there seems to be no coherent alternative), then interaction must have been a later phenomenon."

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I did not say that language as a completed system emerged in an individual in an instant. But I cannot think of a coherent alternative to the idea that mutations take place in individuals, not communities, so that whatever rewiring of the brain yielded the apparently unique properties of language, specifically recursive generation of hierarchically structured expressions, would therefore have taken place in an individual, and only later been used among individuals who had inherited this capacity.

— Noam Chomsky