 An important example of a moral problem left unsettled by the informal public system of morality is whether fetuses are impartially protected by morality and so whether or under what conditions abortions are allowed. There is continuing disagreement among fully informed moral agents about this moral question, even though the legal and political system in the United States has provided fairly clear guidelines about the conditions under which abortion is legally allowed. Despite this important and controversial issue, morality, like all informal public systems, presupposes agreement on how to act in most moral situations, e.g., all agree that killing or seriously harming any moral agent requires strong justification in order to be morally allowed. No one thinks it is morally justified to cheat, deceive, injure, or kill a moral agent simply in order to gain sufficient money to take a fantastic vacation. Moral matters are often thought to be controversial because everyday decisions, about which there is no controversy, are rarely discussed. The amount of agreement concerning what rules are moral rules, and on when it is justified to violate one of these rules, explains why morality can be a public system even though it is an informal system.