This paper presents a historical and philosophical exploration of the foundations and development of jurisprudence, beginning with Roman law and extending to contemporary legal theory. It examines how Roman innovations in civil obligations, torts, procedural justice, and commercial regulation laid enduring foundations for modern legal systems. Central to this was the distinction between jus civile and jus gentium, and the emergence of natural law—a belief in a universal moral order discoverable through reason. Drawing on Roman thinkers such as Cicero, the article shows how law began to be measured not only by authority but by rational justice. The study then traces the refinement of natural law theory in medieval Christian thought, particularly through St. Augustine and St. Thomas Aquinas, who integrated Aristotelian philosophy into a theological framework. With the rise of secular states, figures like Francisco de Vitoria and Hugo Grotius advanced legal theories grounded in reason and universal human rights, laying the groundwork for modern international law. Modern jurisprudence further diversified with the social contract theories of Hobbes, Locke, and Rousseau, and the Enlightenment philosophies of Kant and Hegel. Later jurists such as Kelsen, Austin, and Radbruch contributed to legal positivism and analytical jurisprudence, while Beccaria and Bentham promoted reformist and utilitarian approaches. The paper concludes by surveying contemporary schools of legal theory – philosophical, analytical, sociological, comparative, and ethical – arguing that jurisprudence remains a dynamic discourse shaped by justice, authority, and moral reason. It affirms that today’s legal systems continue to echo ancient debates, highlighting the timeless relevance of jurisprudential inquiry.
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