Economics: Source of Everything?

Culture is the product of economics. Economics in a broader sense than just sale/buy processes. We know that societies have fought for resources before and will fight until the last glimpse light in our solar system will have vanished. Nothing is better for science than war, as long as there are survivors and the cultural structure is not irreversible destroyed. Take for example the Internet which began as military ARPANET to save important data on decentralized nodes in case of a nuclear attack.
So what about language? Beside several other aspects - I just have to simplify at this time - language can be seen as a part of culture - some may even say that culture is language and vice versa. Written language was created to describe rituals, hierarchies and in particular for economic reasons. The perhaps first written language - Sumerian - was exclusively created to describe the economic and administrative processes of Uruk over 4200 years ago. Interestingly the first literary texts were published decades later. I think of it as a kind of economical metaphysical transactions of thoughts through creativity between an individual and its society - to simplify the matter.