Judging Positivism: A Review of Razian Positivism

This review examines Margaret Martin’s Judging Positivism (2014), a critical exploration of legal positivism and its implications for jurisprudence, with particular attention to Joseph Raz’s evolving theories. Martin interrogates Raz’s Sources Thesis, which claims that the legal validity of norms rests on their authoritative provenance, and critiques his conception of law as a set of public practical reasons. She exposes tensions in Raz’s framework, particularly its inability to fully explain why judges consistently adhere to legal sources in adjudication while simultaneously advancing a morally grounded theory of law. By contrasting Raz’s positivist account with Ronald Dworkin’s interpretive perspective and revisiting H.L.A. Hart’s internal aspect of rules, Martin situates positivism within broader debates on adjudicative reasoning, legitimacy, and legal certainty. The book highlights the limitations of Razian positivism, noting that its low threshold for legal authority and neglect of normative justifications weaken its explanatory power. At the same time, Martin demonstrates the continuing significance of legal philosophy for practitioners and the public, showing how theoretical debates influence judicial decision-making and the lived experience of law. This review evaluates Martin’s critique, reflects on the complexities of adjudicative reasoning within positivist frameworks, and underscores the enduring relevance of her arguments for both scholars and clinicians navigating the intersection of law, philosophy, and practice.