 On any definition of “morality”, whether descriptive or normative, it is a code of conduct. However, on ethical- or group-relativist accounts or on individualistic accounts—all of which are best regarded as accounts of morality in the descriptive sense—morality often has no special content that distinguishes it from nonmoral codes of conduct, such as law or religion. Just as a legal code of conduct can have almost any content, as long as it is capable of guiding behavior, and a religious code of conduct has no limits on content, most relativist and individualist accounts of morality place few limits on the content of a moral code. Of course, actual codes do have certain minimal limits—otherwise the societies they characterize would lack the minimum required degree of social cooperation required to sustain their existence over time. On the other hand, for moral realists who explicitly hold that morality is an informal public system that all rational persons would put forward for governing the behavior of all moral agents, it has a fairly definite content. Hobbes (1660), Mill (1861), and most other non-religiously influenced philosophers in the Anglo-American tradition limit morality to behavior that, directly or indirectly, affects others.