I have been thinking about pre 3200 bce humanity for 5 hours at this point and my brain hurts.

[NerimaShinjuku]

They weren't stupid, per se, but no valid reason to invent. As I said, you don't invent new technologies when you are with your circle, even inside jokes form over time and they are not written to explain. Youeither know, or don't. What you do is like a type 3 civilization saying we are　stupid, at our current level. We aren't. Sure we did not invent something better or will take lots of times until reach type 3, maybe another tens of thousands or more, but it just means we are simply at our best. I just want to remind thjt Internet didn't become something like this overnight, it took half a century at best, and even with all the technology we are still coming up with new stuff. Don't take what we use right now for granted. I think.

Counterpoint: They DID invent writing in that 150,000 years because it would have been nearly impossible not to. The only surviving evidence is from 52 kya, but you know what’s easier to write on than cave walls? Trees. Mud, sand. Outdoor rocks with plenty of light and community access, but also exposed to the elements. In other words, all places where evidence would disappear over thousands of years. A whole writing system could have sprung up, vanished when the tribe died out, and the evidence vanished within a thousand years. Probably many times over.

Look, I’m not saying I’m right and you’re wrong. The evidence says you’re right and I know I don’t have a clue what I’m talking about. But I cannot FATHOM these people sitting around for 150,000 years without figuring out writing.