>So obviously in hunter gatherers societies, some were better than others in their job

Sorry, but any serious studies of hunting-gathering tribes shows that the premises of your statement are wrong. First of all, hunting game was a team job, second it only amounted for roughly 10% of the tribes meat intake (fishing and trapping small prey was more the norm), and third, there was no "performance" grading ins such activity. You were part of the tribe or you were not. That was their only metric. Also, the one who did the best during the hunt got to distribute the meat, and served himself last. Caring for the weakest is actually a fundamental human trait. Our culture today was unfortunately built by sociopath.