   Let us now see how Kelsen thought that the basic norm helps to explain the sense in which law is a normative domain and what this normativity consists in. The first and crucial point to realize is that for Kelsen the idea of normativity is tantamount to a genuine “ought”, as it were; it is a justified demand on practical deliberation. A certain content is regarded as normative by an agent if and only if the agent regards that content as a valid reason for action. As Joseph Raz noticed, Kelsen agrees with the Natural Law tradition in this particular respect; both assume that the normativity of law can only be explained as one would explain the normativity of morality, or religion for that matter, namely, in terms of valid reasons for action (Raz 1979, 134–137; but cf. Paulson 2012). But then, the problem for Kelsen is how to explain the difference between the normativity of law and that of morality; if legal “ought” is a genuine “ought”, what makes a legal obligation distinct from a moral one? Kelsen’s answer is that the relevant “ought” is always relative to a given point of view. Each and every type of “ought”, be it religious, moral or legal, must presuppose a certain point of view, a point of view which is constituted by the basic norm of the relevant normative system.