You might enjoy David Graeber’s book Debt: The First 5000 Years, which goes into great detail about the extremely varied social/economic relationships found in cultures around the world.

The book is full of interesting informal systems of exchange, slyly presenting them as alternatives to the quantitative capital system we have today, but there are always tradeoffs. Reading the book I kept thinking how terrible it must have been to argue being wronged if you are a party that suffers a violation of the social exchange system and you're on the socially lower end (of power, popularity, etc.), Without a formal system. At least in our capital system if you are socially dispossessed and the numbers don't add up, there is the possibility of audit and petioning being the victim of fraud.