In order to understand how Hobbes thought the Law of Nature dictates submission to an absolute sovereign, we need to consider his view of the relation between natural law and civil law, and how his notion of what I shall call a hierarchy of responsibility harmonizes that relation. We will also need to sort out some puzzles about how liberty, law, and obligation are to be reconciled within Hobbes's system. Those are the tasks of the current chapter, and they must be successfully completed if the reciprocity interpretation is to satisfy the desideratum laid down in Chapter 4, that an adequate interpretation of Hobbes's moral philosophy must explain precisely, and in a plausible way, how the Law of Nature directs us to submit to the rule of an unlimited sovereign power.