  The main challenge for a theory of law, as Kelsen saw it, is to provide an explanation of legality and the normativity of law, without an attempt to reduce jurisprudence, or “legal science”, to other domains. The law, Kelsen maintained, is basically a scheme of interpretation. Its reality, or objectivity, resides in the sphere of meaning; we attach a legal-normative meaning to certain actions and events in the world (PT1, 10). Suppose, for example, that a new law is enacted by the California legislature. How is it done? Presumably, some people gather in a hall, debate the issue, eventually raise their hands in response to the question of whether they approve a certain document or not, count the number of people who say “yes”, and then promulgate a string of words, etc. Now, of course, the actions and events described here are not the law. To say that the description is of the enactment of a new law is to interpret these actions and events in a certain way. But then, of course, the question is why certain acts or events have such a legal meaning and others don’t?