I dunno about 100,000 years ago, but around 50,000 years ago is when we finished exterminating the Neanderthals.
Humans are not inherently good.
But regardless of how good or bad we are, surely you realize how insane it is to suggest that there could ever exist a society that is 100% free from bad actors, both internal and external? Because in a society without cops the one willing and able to resort to the most violence is king.