Pinker argues that all languages are built on the same universal grammar and that the language mechanism is built into the human brain; thus the basic structures of language are a part of our biological inheritance.
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Some of organization of grammar would have had to have been there from the start, part of the language-learning mechanism that allows children to make sense of the noises they hear from their parents. The details of syntax … are a case where complexity in the mind is not caused by learning; learning is caused by complexity in the mind.
Pinker, Steven. 1995. The Language Instinct. New York: HarperPerennial. pp. 409, 125. || Amazon || WorldCat