Humans were not violent to each other then, that is more a product of Government and central banking than humanity. Humans would NEVER start world wars if not for a central guiding evil force - see
All Quiet on the Western Front (1930), the only true war movie ever made without big bank finance influence - key line "Somebody found a way to profit from (us being in a trench being bombed and buried alive)". So it was probably very similar to the local tavern environment, where the alpha naturally emerges.
There was no money? Money is just a medium for resource exchange. Back then, they traded things, like blueberries for Trout. They had a natural sense of what things were worth. It would be like a farmers market.