We aren’t specifically designed for anything, perhaps outside of the necessary consequences of having our mental capabilities and existing in an evolutionary context, so we can reason about tigers or integers and can persuade others to like us and have sex and help with our kids.

But our material natures are such that we have a profound need for external training sets - we don’t develop linguistic abilities unless we are exposed to a lot of speech. We can’t hear or produce phonemes in general that we are not exposed to during the training years.

Literacy, libraries and printing are so powerful because they extend the lifetime and size of our training material; if we each had to invent culture from our individual powers and skills, we would be living worse than anyone for fifty thousand years has lived.