Evolution Of Language Quotes by Julian Jaynes, Richard Leakey, Terence McKenna and many others.

The bicameral mind with its controlling gods was evolved as a final stage of the evolution of language. And in this development lies the origin of civilization.
It seems inconceivable that a species of human could possess fully modern language and not be fully modern in all other ways, too. For this reason, the evolution of language is widely judged to be the culminating event in the emergence of humanity as we know it today.
We can move no faster than the evolution of our language, and this is certainly part of what the psychedelics are about: they force the evolution of language.