Law and morality

This week is not a detached exercise in jurisprudence. It is a legal-method topic. The question is how moral argument appears, and how far it may properly appear, in English legal reasoning. Students who have followed the first five weeks should now be able to locate sources, explain precedent, interpret statutes, reason by analogy, and brief cases. Law and morality tests whether those skills are merely mechanical or properly lawyerly. A lawyer must know when an argument is an argument from legal authority, when it is an argument from political morality, and when the former silently depends upon the latter.

The central distinction is between legal validity and moral merit. A rule may be legally valid although morally objectionable; conversely, a moral principle may be compelling without being law. That distinction is the foundation of legal positivism. It matters in practice. A court asked to apply an Act of Parliament does not possess a general jurisdiction to refuse enforcement merely because the Act is unjust. A student who writes that a court should simply apply morality has not yet absorbed the discipline of sources. Equally, it is a serious error to suppose that English law is morally inert. The common law contains concepts such as reasonableness, good faith in limited contexts, unconscionability, public policy, proportionality, dignity, autonomy, responsibility and fairness. These are not self-applying technical labels. They require evaluative judgment.

The topic therefore has two sides. The first is analytic: what makes law law? The second is institutional: which body, in the English constitution, has authority to translate moral judgment into legal rule? Parliament legislates. Courts interpret statutes and develop the common law incrementally. Public authorities must act compatibly with Convention rights under the Human Rights Act 1998. Each institutional setting admits moral reasoning differently. A judge construing a statute after Ghaidan v Godin-Mendoza may use rights-based interpretation, but cannot contradict the fundamental feature or underlying thrust of legislation. A judge developing the common law may respond to changed social conditions, as in R v R, but should ordinarily proceed from existing principle. A judge applying clear primary legislation cannot strike it down merely because it is immoral.

For Durham Year 1 students, the importance is cumulative. Contract will ask whether promises should be enforced because of consent, reliance, efficiency or fairness. Tort will ask whether liability should express corrective justice, deterrence, loss distribution or rights protection. Constitutional Law will ask whether parliamentary sovereignty permits immoral legislation, and whether rights instruments alter that position. Individual and State will ask how public law controls state power through legality, rationality, legitimate expectation and proportionality. This week supplies the vocabulary for those questions. In an examination or tutorial answer, the best work does not announce a grand theory and then ignore doctrine. It moves carefully from source to source, identifies the institutional constraint, and then explains the moral premise that the legal rule either embodies, suppresses or leaves unresolved.

English law has never developed as a purely deductive moral code. It is a common-law system shaped by writs, remedies, jurisdictional boundaries, parliamentary intervention and adversarial litigation. That history explains why moral arguments in English law often appear indirectly. They are embedded in doctrinal categories rather than announced as first principles. Negligence speaks the language of duty, breach and reasonable care; contract speaks of agreement, consideration and intention; public law speaks of legality, reasonableness and proportionality. These doctrines carry moral assumptions, but their authority is legal.

The classical natural law tradition held that unjust law, at least in an extreme sense, lacks full legal authority. Aquinas did not simply say that any unjust enactment is void in a modern court. The better point is that law claims moral authority because it is directed to the common good. That tradition influenced English constitutional thought, especially in rhetoric about fundamental law and the rule of law, but it never displaced parliamentary sovereignty as the orthodox legal rule. Sir Edward Coke’s remarks in Dr Bonham’s Case are sometimes invoked as an early judicial power to control Acts of Parliament, but modern English constitutional doctrine has not accepted a general common-law power to invalidate primary legislation for moral repugnancy.

The nineteenth century brought a sharper separation of law and morality. Bentham attacked natural rights as rhetorical confusion and insisted upon law as the command of a political superior, while also demanding systematic legal reform. Austin’s command theory identified law with commands backed by sanctions issued by a sovereign habitually obeyed. Its defects are now familiar: it fits criminal prohibitions better than powers, constitutional rules and customary norms; it struggles with continuity across sovereigns; and it treats legal obligation as too close to coercive threat. Nevertheless, it contributed an enduring methodological point: description of law must be separated from moral praise of law.

Twentieth-century legal positivism refined that point. H L A Hart rejected Austin’s command theory and described law as a union of primary rules of obligation and secondary rules, especially rules of recognition, change and adjudication. His separability thesis did not deny that law and morality often overlap. It denied that moral merit is a necessary condition of legal validity in every legal system. This enabled Hart to criticise immoral law without pretending it was not law. That distinction became central to the Hart-Devlin debate after the Wolfenden Report. Devlin argued that society may use criminal law to preserve its moral structure; Hart argued that the state should not criminalise private immorality merely because the majority disapproves of it, drawing heavily on Mill’s harm principle.

The post-war rights settlement complicated the picture. The European Convention on Human Rights did not originally form part of domestic law. The Human Rights Act 1998 altered legal method without abandoning parliamentary sovereignty. Courts must take Strasbourg jurisprudence into account, interpret legislation compatibly with Convention rights so far as possible, and may make declarations of incompatibility. They may not strike down primary legislation. This is a distinctively British compromise: morality enters legal reasoning through rights, proportionality and legality, but within institutional limits. The history matters because it prevents two mistakes. First, English law is not a natural-law system in which judges directly enforce all moral truth. Secondly, it is not a crude positivist machine in which judicial reasoning is morally empty. It is a source-based system in which evaluative judgment is channelled through recognised legal materials.

1. Legal validity is not the same as moral justification. This is the first proposition to master. Legal validity asks whether a norm is recognised by the legal system as law: an Act of Parliament, a binding precedent, a valid statutory instrument, a retained rule of common law, or a directly relevant constitutional instrument. Moral justification asks whether the norm ought to exist, ought to be obeyed, or ought to be applied. The two questions overlap in argument but must not be conflated. A statute imposing a harsh rule may be valid. A morally attractive principle may not be legally enforceable. A first-class answer keeps both thoughts in view.

1. The English constitution channels moral argument institutionally. Parliament may enact moral judgments as legislation. Courts may interpret and develop law, but their authority differs across contexts. In statutory interpretation, the starting point is the enacted text read in context and purpose. Moral values may enter through presumptions of legality, the principle of legality, Convention-compatible interpretation under the Human Rights Act 1998, and ordinary purposive reasoning. But courts do not possess a roving commission to rewrite legislation because they prefer a different moral settlement. In common-law development, courts have more creative space, but development must remain principled, incremental and compatible with precedent unless a superior court departs from it.

1. Moral language is often doctrinal language. Terms such as reasonable, fair, just, equitable, unconscionable, proportionate and in the public interest are not invitations to impressionistic justice. They are legally structured standards. The reasonable person in tort is not simply the judge’s moral preference. Proportionality in rights law has an ordered structure: legitimate aim, suitability, necessity and fair balance. Public policy in illegality or restraint of trade is not free-form moralising; it is controlled by authority and principle. The skill is to translate moral concern into the relevant legal test.

The cases in this topic should not be treated as a random list of controversial moral disputes. They reveal different legal mechanisms through which moral judgment enters English law.

Shaw v DPP and Knuller are the starting points for public morality. In Shaw the House of Lords upheld convictions arising from the publication of a directory of prostitutes, recognising conspiracy to corrupt public morals. In Knuller the House of Lords confirmed the existence of that offence, while acknowledging anxieties about judicial creativity in criminal law. These cases are doctrinally uncomfortable for modern lawyers. They sit uneasily with legality, fair warning and the principle that crimes should normally be created by Parliament. But they are important because they show an older conception of the common law as guardian of public moral welfare.

R v Brown exposes the limits of consent and autonomy in criminal law. The majority held that consent was no defence to actual bodily harm and wounding inflicted during sadomasochistic sexual activity. The dissenting speeches placed greater weight on private autonomy and the absence of complaint by participants. The case is a model for exam discussion because both sides use morality: the majority invokes protection from harm and public interest; the minority invokes liberty and privacy. It is therefore wrong to describe Brown as law versus morality. It is one moral conception embedded in law against another.

R v R illustrates lawful moral change. The marital rape exemption was rejected as a common-law fiction inconsistent with the modern legal status of married women. The decision raises questions of retroactivity and judicial law-making, but it also demonstrates the common law’s capacity to abandon doctrines whose moral and social premises have collapsed. The better analysis is institutional: the court did not enact a new crime from nowhere; it removed an exemption inconsistent with the general law of rape.

Gillick concerns parental authority, medical judgment, child welfare and autonomy. The House of Lords held that a doctor could lawfully give contraceptive advice or treatment to a girl under 16 without parental consent where she had sufficient understanding and intelligence. The case is not merely about morality of contraception. It is about legal competence and the gradual transition from parental control to child autonomy.

Airedale NHS Trust v Bland and Nicklinson concern end-of-life decision-making. Bland allowed withdrawal of artificial nutrition and hydration from a patient in a persistent vegetative state where continuation was not in his best interests. The decision distinguished acts from omissions and killing from allowing to die. Nicklinson concerned assisted suicide and the compatibility of the statutory prohibition with Article 8. The Supreme Court recognised the moral gravity of autonomy arguments but was divided on whether, and when, courts should issue a declaration of incompatibility. Institutional competence was central.

Ghaidan is the rights-interpretation case. The House of Lords interpreted legislation concerning succession to a statutory tenancy so as to include same-sex partners. It shows how morality enters through equality and dignity, but only because section 3 of the Human Rights Act supplies a legal interpretative mandate. For Week 6, the cases collectively teach one lesson: moral reasoning is never self-standing in legal method. It operates through crime, consent, common-law development, welfare, rights, statutory interpretation and institutional competence.

See practice questions section below.

See further reading section below.