This article presents a critical reevaluation of the thesis—closely associated with H. L. A. Hart, and central to the views of most recent legal philosophers—that the idea of state coercion is not logically essential to the definition of law. The author argues that even laws governing contracts must ultimately be understood as “commands of the sovereign, backed by force.” This follows in part from recognition that the “sovereign,” defined rigorously, at the highest level of abstraction, is that person or entity (...) identified by reference to game theory and the philosophical idea of “convention” as the source of signals with which the subject population has become effectively locked, as a group, into conformity. (shrink)

ABSTRACTConventionalism once seemed an attractive way to justify the viability of the positivistic social thesis. Subsequent criticism, however, has significantly lessened its attractiveness. This paper attempts to revive jurisprudential interest in conventionalism by claiming that positivists would profit more from the conventionalism of Ruth G. Millikan than that of David Lewis.Three arguments are proffered to support this contention. First, Millikan's conventionalism is not vulnerable to the major criticism leveled at conventionalism, viz its compliance-dependence, as this is not its defining feature. (...) Second, Millikanian conventionalism retains conventionalism's ability to explain how law emerges from social practices while avoiding the main disadvantage of Lewisian conventionalism, viz its inability to explain the normativity and contestability of law. Third, Millikan's conventionalism can more effectively repel Dworkin's and Greenberg's assaults on legal positivism than its Lewisian counterpart.To the memory of Maurice O'Brien. (shrink)

Hart proposed that law is made possible by the practice among legal officials of observing conventional social rules, the most important being rules of recognition. This view has been dubbed the practice theory, and it has been attacked by many legal theorists. This paper argues that many criticisms of the practice theory fail because they misunderstand the nature of the organizational challenge to which rules of recognition are the solution. The challenge of constituting a legal system is essentially the challenge (...) of constituting a group agent, and when viewed through Pettit’s account of group agency, the practice theory can easily be defended. (shrink)

Legal theorists standardly hold that stability is one of eight necessary conditions for legal guidance. We lack an adequate explanation, however, of why, exactly, stability is necessary in order that law possess the capacity to guide behavior. Standard explanations, which rely on a claim about reasonable expectations, fail to connect the concepts of stability and legal guidance. In this paper, I argue that, according to the leading conception of legal guidance, stability is, in fact, not necessary in order for law (...) to possess the capacity to guide. In response, I provide an alternative conception of legal guidance, and argue that stability is a necessary attribute if we assume this conception of guidance. More generally, the paper sets out an abstract framework in which claims that this or that property is necessary for legal guidance can be assessed. (shrink)