Jurisprudence: Philosophy of Law, Thinkers & Theories

Overview

Jurisprudence, or the philosophy of law, is the branch of philosophy that examines the nature of law, legal reasoning, and the relationship between law, morality, and justice. It asks fundamental questions about what law is, what makes a law valid, and how judges should decide cases. The philosophy of law is closely connected to political philosophy, ethics, and social theory, and its answers have profound implications for the legitimacy of legal systems and the administration of justice.

The central debate in jurisprudence is between natural law theory and legal positivism. Natural law theory holds that there is a necessary connection between law and morality: a law that is grossly unjust is not really law at all. Legal positivism holds that the validity of a law depends on its source, not its content: a law is valid if it was enacted by the appropriate authority in the proper way, regardless of whether it is just or unjust.

Key Thinkers

The natural law tradition was developed by Thomas Aquinas, who argued that human law is derived from the natural law, which is itself derived from the eternal law of God. The legal positivist tradition was developed by John Austin, who argued that law is the command of a sovereign, and by H. L. A. Hart, who argued that law is a system of primary and secondary rules. The contemporary debate has been shaped by the work of Lon Fuller, who argued that law has an internal morality, and by Ronald Dworkin, who argued that legal interpretation necessarily involves moral judgment.

Philosophical Relevance

Jurisprudence is essential to political philosophy because the law is the primary instrument through which political authority is exercised and justice is administered. The question of what law is, and how it should be interpreted, is inseparable from the question of what justice requires. The philosophy of law provides the conceptual framework for understanding the relationship between legal rules and moral principles, and for evaluating the legitimacy of legal systems.

Sources

1. Stanford Encyclopedia of Philosophy, "Philosophy of Law." Comprehensive survey of the main issues in jurisprudence.
2. Stanford Encyclopedia of Philosophy, "Natural Law." Analysis of the natural law tradition.
3. Stanford Encyclopedia of Philosophy, "Legal Positivism." Survey of the legal positivist tradition.