This article investigates the influence of natural law theory on human-rights adjudication in Nigeria from 2000 to 2024. The central concern of the study is that, while Nigerian law is formally structured around constitutional supremacy, statutory validity, and other positivist foundations, judicial decisions in fundamental-rights cases often reveal reliance on broader moral considerations such as justice, dignity, fairness, and the common good. The study therefore interrogates the extent to which natural law theory, whether expressly acknowledged or implicitly applied, continues to shape the adjudicatory approach of Nigerian courts in the protection and enforcement of human rights. The study employs doctrinal legal research methodology. It draws on primary legal materials such as the Constitution of the Federal Republic of Nigeria 1999 (as amended), the African Charter on Human and Peoples’ Rights, the Fundamental Rights (Enforcement Procedure) Rules 2009, and relevant judicial decisions, as well as secondary materials including textbooks, journal articles, and scholarly writings in jurisprudence, constitutional law, and human-rights law. The theoretical framework of the study is principally rooted in natural law theory, supported by legal positivism and legal realism as complementary perspectives. The study reveals that Nigerian human-rights adjudication is not merely an exercise in formal legal application, but also a process substantially informed by moral and purposive reasoning. It shows that courts, especially in rights-based litigation, often interpret legal norms in a manner that advances substantive justice and preserves the dignity of the human person. In this regard, natural-law values remain influential, even where judicial reasoning is formally expressed in constitutional or statutory terms. At the same time, positivism explains the institutional and formal structure of the legal system, while realism clarifies the practical role of judicial discretion and social context in adjudication. The study concludes that natural law theory retains enduring relevance in Nigerian human-rights jurisprudence and that its influence is most visible in judicial efforts to interpret and enforce rights in a way that promotes justice rather than mere formal legality. The research recommends a sustained commitment to purposive and rights-oriented adjudication, as well as deeper scholarly engagement with the relationship between jurisprudential theory and judicial practice in Nigeria.
Keywords: Adjudication and the Nigerian Legal System, Human Rights, Natural Law Theory
