In contrast to natural law theories, other moral theories do not hold quite so strong a view about the universality of knowledge of morality. Still, many hold that morality is known to all who can legitimately be judged by it. Baier (1958), Rawls (1971) and contractarians deny that there can be an esoteric morality: one that judges people even though they cannot know what it prohibits, requires, etc. For all of the above theorists, morality is what we can call a public system: a system of norms