Markets, at least in their modern incarnation, are evolutionarily novel. According to Debt: The First 5,000 Years, hunter-gatherers traded not just by barter but by social indebtedness. We see that today; when my friends and I grab lunch, it feels natural to say "Don't worry, I got this; you can pick up the tab next time." There's a definite Dunbar limit to how large these networks can grow; get beyond that and you're in evolutionarily novel territory.
As an aside, the notion that economic inequality is evolutionary novel offers quite a bit of insight into why we treat wealth inequality vastly differently than status inequalities.
The last point reminded me of speculation from the recent LessWrong article Conspiracy Theories as Agency Fictions:
Before thinking about these points and debating them I strongly recommend you read the full article.