God, Nature, and Human Law

This chapter introduces the natural law tradition as a philosophical approach that sees law as rooted in objective moral order discernible through human reason. It traces the development of natural law from Plato, who saw law as the rational pursuit of the good, to Aristotle, who linked natural justice to the perfection of human nature and political community. The synthesis of classical philosophy and Christian theology in Aquinas’s work is highlighted as a ‘central case,’ grounding law in eternal reason and distinguishing just laws from mere acts of power. The chapter then examines modern natural law theories through a discussion of the philosophical contributions of Lon Fuller and John Finnis. It concludes with an exploration of Islamic intellectual traditions, particularly Muʿtazilī and Imāmī thought, that affirm the objectivity of morality and the intelligibility of divine justice. By providing a historical survey of the contributions of major thinkers in the natural law tradition, this chapter seeks to identify its central commitments.