You might be interested in reading about the Piraha tribe in South America. They have no creation stories or myths, nor do they have religion.
This is an interview where Daniel Everett, a researcher who spent many years living with those people and studying their language, in which he shares some interesting highlights: http://7thavenueproject.com/po...
His book "Don't sleep in the jungle, there are snakes" provides a more detailed picture of the Piraha culture and lifestyle.
Their language has a few interesting features, tenses are one of them. They use one form of a verb to talk about things they've seen themselves, and another form for expressing ideas which they have heard from someone who has had first-hand experience.
This makes the language unsuitable for expressing abstract thought (have you ever seen a "derived class" or a "variable" or "cosine of X^2"?). This is also why they have no religion and attempts to christianize them were not successful. "Have you _seen_ Jesus walk on water?" turned out to be a very effective filter for them.