@aynish writing down words, yeah. Yes, it couldn't've been invented without a language in place beforehand, but I still think text is more ground breaking than language. What's your word if your grandson can't read it 60 years later? Nothing.
Regarding language being a pre-human invention. Will, it might be true, though I don't know of that. Can you share a link or something? Who communicated using a language? Bees with their dances? If we consider it a language, then yeah.
@bouncepaw >what's your word if your grandson can't read
I think this is the wrong way around, what's your text if your son can't read? oral traditions far outweigh any text in terms of legacy, here's an example of a standing tradition for 10k years
https://www.scientificamerican.com/article/ancient-sea-rise-tale-told-accurately-for-10-000-years/
that's far longer than any written work has remained understandable by nearly double
historic and scientific evidence currently don't have the ability to prove that statement, here's a link https://www.sciencefocus.com/news/neanderthals-could-talk-like-humans-study-suggests/
@bouncepaw >what's your word if your grandson can't read
I think this is the wrong way around, what's your text if your son can't read? oral traditions far outweigh any text in terms of legacy, here's an example of a standing tradition for 10k years
https://www.scientificamerican.com/article/ancient-sea-rise-tale-told-accurately-for-10-000-years/