 Curry notes that rules related to kinship, mutualism, exchange, and various forms of conflict resolution appear in virtually all societies. And he argues that many of them have precursors in animal behavior, and can be explained by appeal to his central hypothesis of morality as a solution to problems of cooperation and conflict resolution. He also notes that philosophers, from Aristotle through Hume, Russell, and Rawls, all took cooperation and conflict resolution to be central ideas in understanding morality. It is unclear, however, whether Curry’s view can adequately distinguish morality from law and from other systems that aim to reduce conflict by providing solutions to coordination problems.