You guys have highlighted a cultural heritage that is associated with the development of writing, learning etc. The cultural traits of writing (and probably a lot more besides) were inherited by successive cultures.

Once a culture develops writing, the language can expand past the point where it must be held in every speakers mind. Concepts can be developed that are not in every day use. Through writing the greatest thinkers and teachers of the past can instruct us directly, in their own words. Writing becomes a mechanism to store the teachings of the greatest thinkers, and to (in some cases) refine and improve on those lessons.

Both "The Art of War" and The Bible were (probably) written by many authors, and have (probably) gone through many versions before reaching their current forms. Both have had huge cultural impact in their own way.

Conversely I drawn your attention to this video: "African Language and the African Mind"

In it a Professor Eugene Valberg (Teacher, Professor of Philosophy) speaks about his experiences living and teaching in South Africa, and his investigation into the language of Zulu and the minds of the speakers of that language. Feel free to look at the comments.