> If I was not producing enough for the tribe or group I would be left behind or worse. The strong ones had the most food, women, and best spot in the 'cave' i.e. inequality.

There were no known tribes over ten thousand years ago, there were bands. In your perception, children abandoned their parents to death when they aged, which is not behavior anthropologists observed in modern hunter gatherer bands. Also, anthropologists observer modern hunter gatherer bands eating gathered berries and the hunt in communal meals. You do not have one man with multiple wives/concubines/mistresses in the manner of the class societies following this - although often all the fertile men and women who are not close relations are sleeping with one another. Your picture of pre-class society does not jibe with archeological finds of old societies or anthropological observations of modern ones.

Here's one example:

https://www.denverpost.com/2012/12/17/archaeologists-find-pr...

https://www.nytimes.com/2012/12/18/science/ancient-bones-tha...