So instead of writing I was investigating. The oldest known city that is still inhabited and oldest art is from Jericho. Apparently there is a statute head from 9000 BCE. I'm ok with pushing the date further back, as the math doesn't truly bother me in my little theory.
But I found it interesting that when I asked for no judgment, people assumed that I said the Chinese, Greeks etc were without souls. Talking about putting words and opinions onto others.
Anyone who can write, draw or communicate has a soul. There is no way to carbon date my own theory with the story.