CSFilm: Sorry it took so long to respond
Anyway, I feel written language because it is the first step of the rise of advanced civilization (in my humble opinion). Humans and hominids had been communicating for long long before this, whether through speech or gestures or whatever....but with the advent of the written word humans could begin to convey and share their thoughts, ideas, etc to others. There would be no Bible to tell the birth of Jesus without the ability to write, would there? Or the birth of Mohammad or Buddha or whoever. Just my opinion though!