``` what is natural law? ``` **Natural law** is a philosophical and legal theory that holds there are universal moral principles or rules of justice inherent in human nature and/or the structure of reality. These principles are discoverable through **reason** (rather than solely through revelation, custom, or arbitrary human decree) and serve as a standard to evaluate, guide, or limit human-made laws (known as **positive law**). In essence, natural law theory asserts that "right" and "wrong" are not purely subjective, cultural inventions, or matters of power—they are objective and rooted in the way things *are* (nature). Actions or laws that violate these principles are considered unjust or defective, even if enacted by a legitimate government. ### Key Historical Development - **Ancient roots**: Aristotle distinguished what is "just by nature" (universal) from what is "just by law" (conventional and varying by society). The Stoics emphasized a rational, egalitarian "law of nature" (logos) common to all humans. - **Roman and early Christian**: Cicero described true law as "right reason in agreement with nature," universal and unchanging. St. Paul spoke of a law "written on the hearts" of Gentiles. - **Medieval synthesis — Thomas Aquinas** (the most influential formulation): Natural law is humanity's rational participation in the **Eternal Law** (God's providential order for the universe). Aquinas integrated Aristotle with Christian theology. He distinguished four kinds of law: - **Eternal Law**: God's overall plan governing all creation. - **Natural Law**: The part of eternal law accessible to human reason, based on our natural inclinations (e.g., self-preservation, seeking truth/good, living in society, procreation). Primary precept: "Good is to be done and pursued, and evil avoided." - **Divine Law**: God's revealed law in Scripture (Old and New Testaments), which supplements natural law where reason is weak or for supernatural ends. - **Human (Positive) Law**: Specific rules made by governments, which must derive from or at least not contradict natural law to be just. Aquinas argued that because humans are rational beings, morality flows from conforming our actions to our rational nature. - **Modern/Enlightenment era**: Thinkers like John Locke secularized aspects of natural law, grounding **natural rights** (life, liberty, property) in human nature and reason. These rights justify limited government and even revolution if violated. Hugo Grotius and Samuel Pufendorf further developed more secular versions, emphasizing reason and social contracts while downplaying direct divine dependence. ### Core Ideas Across Versions - Morality and justice are **objective** and derived from human nature (rationality, inclinations toward basic goods like knowledge, life, sociability). - Natural law is **universal** — it applies to all people, at all times, in all cultures. - It provides a higher standard: Unjust positive laws (e.g., those authorizing slavery or genocide) lack true moral authority. - Reason is the primary tool for discovering it (though religious versions see reason as participating in divine order). ### Natural Law vs. Related Concepts - **Vs. Positive Law**: Positive law is what humans actually enact (statutes, constitutions). Natural law theorists say positive law is valid only insofar as it aligns with natural principles. - **Vs. Divine Law**: Divine law is God's direct revelation (e.g., Ten Commandments). Natural law is accessible via reason alone, without needing scripture (though many theorists, like Aquinas, see harmony between them). - **Vs. Legal Positivism**: Positivism holds that law is simply what the sovereign or system declares it to be—validity depends on source and procedure, not moral content. Natural law rejects this "law is law" separation of "is" from "ought." ### Criticisms and Variations Natural law faces challenges: What exactly counts as "human nature"? How do we resolve disagreements about what reason reveals? Modern secular versions (e.g., new natural law theory by John Finnis) focus more on self-evident basic goods and practical reason, avoiding heavy metaphysics or teleology (purpose-driven nature). Some secular or libertarian perspectives derive similar ideas from observable requirements of human survival and flourishing as rational beings, without invoking God. In the context of our earlier discussion of **Ayn Rand's Objectivism**: Rand rejected traditional natural law (especially its religious or Aristotelian teleological elements) as mystical or intrinsicist. However, she grounded individual rights and morality in "man's nature as a rational being" and the objective requirements of human life and survival *qua* man. Rights, for Rand, are moral principles identifying the social conditions needed for rational beings to live and flourish—derived from reality and reason, not from God, society, or arbitrary decree. This creates a secular, this-worldly foundation for ethics and politics that shares some structural similarities with natural rights traditions (e.g., emphasis on reason and individual life) but rests explicitly on Objectivist metaphysics and egoistic ethics rather than divine order or innate "goods." Natural law has profoundly influenced Western thought, including concepts of human rights, just war theory, constitutionalism, and the idea that governments are limited by a higher moral order. It remains debated in ethics, jurisprudence, and political philosophy today.