In the Essays on the Law of Nature, Locke writes that “all the requisites of a law are found in natural law” (Locke 1663–4, 82). But, what, for Locke, is required for something to be a law? Locke takes stock of what constitutes law in order to establish the legalistic framework for morality: First, law must be founded on the will of a superior. Second, it must perform the function of establishing rules of behavior. Third, it must be binding on humans, since there is a duty of compliance owed to