Earlier 'cave men' invented ways of advanced communication, hunting strategies involving fire, painting and the list goes on.Hello; I like your take on this. Some of this will depend on which early sentient humans are referenced when talking about "cave men."
Some movies that picture these early humans as talking in grunts and being simple may have started this way of thinking about early humans. Not likely an accurate portrayal and very likely very wrong. I like to think these early folks did quite well with what they had. Somewhere along the line they found a way to survive in a hostile environment and prosper. They also figured out a lot of things from scratch.
I hate it when others are called stupid because they can't grasp a particular skill. Not everyone can, its just how things are.
