Colemanand Shapiro have recently advanced a second at- tempt to reconcile Hart’s practice theory of rules and the idea of the normativity of law; i.e., the idea that legal rules qua social rules give reasons for actions and, in some circumstances create and impose duties and obligations. Their argumentative strategy is to resort to elements in Bratman’s work on shared agency and planning, though they introduce important and substantive modifications to Bratman’s own explanation. Bratman describes his own theory as a (...) modest theory of the will where the notion of planning plays a fundamental role. Both Shapiro’s and Coleman’s application of Bratman’s planning theory of agency to an authority structure such as law is impressive, but a number of objections can be levelled, with the intention of grasping both the nature of authority structures and the normativity of law. Although I have referred to Shapiro’s and Coleman’s applica- tions as being similar to one another, the differences are sub- stantive and important. I will scrutinise both Shapiro’s and Coleman’s explanations of ‘shared agency’ and discuss the objections that can be raised against each application. (shrink)

The essay discusses the import of the separability thesis both for legal positivism and for contemporary legal practice. First, the place of the separability thesis in legal positivism will be explored, distinguishing between “standard positivism” and “post‐Hartian positivism.” Then I will consider various kinds of relations between law and morality that are worthy of jurisprudential interest, and explore, from a positivist point of view, what kind of relations between law and morality must be rejected, what kind of such relations should (...) be taken into account, and what kind of such relations are indeed of no import at all. The upshot of this analysis consists in highlighting the distinction between two different dimensions of legal validity (formal validity and material validity respectively), and in pointing out that the positivist separability thesis can apply to formal validity only. On the other hand, when the ascertainment of material validity is at stake, some form of moral reasoning may well be involved (here and now, it is necessarily involved). The essay concludes with some brief remarks on the persisting importance of the positivist jurisprudential project. (shrink)

Legal positivism's ``separation thesis'' is usually taken in one of two ways: as an analytic claim about the nature of law – roughly, as some version of the Social Thesis; or as a substantive claim about the moral value of law – roughly, as some version of the Value Thesis. In this paper I argue that we should recognize a third kind of positivist separation thesis, one which complements, but is distinct from, positivism's analytic and moral claims. The Neutrality Thesis (...) says that the correct analytic claim about the nature of law does not by itself entail any substantive claims about the moral value of law. I give careful formulations of these three separation theses, explain the relationships between them, and sketch the role that each plays in the positivist approach to law. (shrink)

Scott Shapiro, a prominent defender of exclusive legal positivism—exclusivism—has intriguingly (re)introduced a logical principle, the endorsement and rejection of which he (I take it) supposes can helpfully distinguish exclusivism from its contrary, inclusive legal positivism—inclusivism. It is an intriguing thought that principles pitched at such a high level of abstraction as this could distinguish between the two versions of positivism. My aim will be to test whether this principle—and associated principles—can do such distinguishing work.