Economics assumes a division between different spheres of human behavior that, among people like the Gunwinngu and the Nambikwara, simply does not exist. These divisions in turn are made possible by very specific institutional arrangements—the existence of lawyers, prisons, and police—to ensure that even people who don’t like each other very much, who have no interest in developing any kind of ongoing relationship, but are simply interested in getting their hands on as much of the others’ possessions as possible, will nonetheless refrain from the most obvious expedient (theft).