The freer the society gets, the more dangerous the great beast becomes and the more you have to be careful to cage it somehow.
Noam ChomskyLanguage would have evolved first as an internal object, a kind of "language of thought" (LOT), with externalisation (hence communication) an ancillary process. I can't review here the strong and growing evidence to support this conclusion, but I have elsewhere. There are ample reasons why having a LOT would confer selectional advantage: the person so endowed could plan, interpret, reflect, etc., in ways denied to others.
Noam ChomskyGrowth is a funny sort of concept. For example, our GNP increases every time we build a prison. Well, okay, it's growth in a sense.
Noam Chomsky