Ancient Native Americans used to have an interesting system. Most of the year they would roam around in "anarchic" groups of 100-200. During the buffalo hunting season, hundreds of nomadic tribes would come together and build a tent city with thousands of individuals. They'd elect a tribe to "police" the hunt, effectively insuring that everyone got a fair split of meat, and other animal products. There was a rule where the same tribe couldn't be elected twice, so if someone took an issue with the way order was kept, they could wait until hunting season was over and volunteer their own tribe to police next year.