Introduction
The relationship between criminal law and morality is a fundamental and often contentious issue in legal theory. While many actions that are criminalised, such as murder or theft, are also widely considered immoral, the two concepts are not the same. A crime can be defined as an act or omission prohibited by the state and subject to punishment, whereas morality refers to a set of principles concerning right and wrong conduct, often derived from religion, philosophy, or societal norms. The question of whether the law should enforce morality has been a source of significant debate. This essay will differentiate between crime and morality by examining areas where they overlap and diverge. It will then analyse the impact of the landmark case of Director of Public Prosecutions v Shaw [1962] AC 220, arguing that it represents a key moment where the judiciary explicitly used the criminal law to act as a guardian of public morality, thereby raising important questions about legal certainty and the separation of powers.
The Distinction Between Crime and Morality
The primary distinction between crime and morality lies in their source and enforcement. Criminal law is a formal system established by the state. An act becomes a crime because it has been defined as such in statute or through common law precedent. Its enforcement is conducted by state agencies like the police and the Crown Prosecution Service, and those found guilty are subject to formally prescribed punishments, such as imprisonment or fines. The purpose of criminal law is generally understood to be the maintenance of public order, the protection of individuals from harm, and the punishment of 'public wrongs' (Gardner, 2007).
Morality, by contrast, is an informal system of beliefs and values. It is not created by Parliament but evolves within society, communities, and individuals. Enforcement of moral codes is informal, through social pressure, disapproval, or personal conscience, rather than through the legal system. For example, while adultery may be considered immoral by many, it is not a criminal offence in England and Wales. Similarly, lying to a friend is a moral wrong but is not, in itself, a crime unless it forms part of a criminal offence such as fraud.
This distinction is highlighted by the existence of acts that are criminal but not necessarily immoral, and acts that are immoral but not criminal. Many regulatory offences, often described as mala prohibita (wrong because prohibited), fall into the first category. For example, parking on a double yellow line or failing to have a valid television licence are crimes, but few would consider them to be inherently immoral acts. They are criminalised for reasons of public administration and order. Conversely, many acts considered immoral, such as being unfaithful in a relationship or refusing to help someone in need (where there is no pre-existing duty of care), are not criminalised.
The philosophical basis for limiting the scope of the criminal law is often traced to John Stuart Mill’s 'harm principle'. Mill argued that "the only purpose for which power can be rightfully exercised over any member of a civilized community, against his will, is to prevent harm to others" (Mill, 1859). This liberal view suggests that the law should not interfere with individual liberty simply because an act is considered immoral, unless that act causes direct harm to another person. This perspective informed the famous Hart-Devlin debate, which provides the theoretical context for understanding cases like Shaw. Professor H.L.A. Hart argued for a separation of law and morality, suggesting that using the law to enforce morals was unnecessary, undesirable, and immoral (Hart, 1963). In contrast, Lord Devlin argued that a shared public morality was the 'cement of society' and that the law had a legitimate role in protecting society from disintegration by punishing conduct that outraged public decency, even if it did not cause direct harm to individuals (Devlin, 1965). It was Lord Devlin's judicial philosophy that found its ultimate expression in the Shaw case.
The Impact of Director of Public Prosecutions v Shaw
The case of DPP v Shaw [1962] AC 220 is a pivotal authority on the relationship between law and morality in England and Wales. The defendant, Shaw, had published a booklet titled the 'Ladies Directory', which contained the names, contact details, and photographs of prostitutes, along with descriptions of the sexual services they offered. While prostitution itself was not illegal, soliciting in a street was, following the Street Offences Act 1959. Shaw was charged with several offences, including the common law offence of conspiracy to corrupt public morals. The central legal question for the House of Lords was whether such an offence existed in law.
The House of Lords, by a majority of four to one, held that the offence of conspiracy to corrupt public morals did indeed exist. The majority judgment, led by Viscount Simonds, is a clear articulation of a judicial philosophy that the courts have a duty to protect the moral fabric of society. He famously stated:
> "In the sphere of criminal law I entertain no doubt that there remains in the Courts of Law a residual power to enforce the supreme and fundamental purpose of the law, to conserve not only the safety and order but also the moral welfare of the State, and that it is their duty to guard it against attacks which may be the more insidious because they are novel and unprepared for." (DPP v Shaw [1962] AC 220, 267)
This statement positioned the courts as the guardians of public morality, with a 'residual power' to create or revive offences to deal with conduct they deemed morally harmful. The impact of this decision was significant and controversial for several reasons.
First, it represented a clear victory for the judicial philosophy of Lord Devlin over that of H.L.A. Hart. The court was not punishing an act because it caused demonstrable harm in the Millian sense, but because it was believed to threaten the "moral welfare of the State". Shaw's publication was seen as a commercial enterprise that facilitated and encouraged what was considered immoral behaviour, and the court stepped in to punish it on that basis. This blurred the line between crime and morality by suggesting that a grave moral wrong could, by that fact alone, be treated as a crime.
Second, the decision was heavily criticised for representing a form of judicial law-making. Critics argued that the creation of new criminal offences is the constitutional role of the elected Parliament, not the unelected judiciary. By affirming the existence of such a vague and broad offence, the House of Lords was seen to be encroaching upon the legislative function, contrary to the principle of the separation of powers. Lord Reid, in his powerful dissenting judgment, warned against this, stating that "Where Parliament fears to tread it is not for the courts to rush in" (DPP v Shaw [1962] AC 220, 275).
Third, the case raised serious concerns about legal certainty, a core principle of the rule of law. The offence of 'conspiracy to corrupt public morals' is inherently vague. What constitutes 'public morals' can change over time and differ between communities, and what it means to 'corrupt' them is equally unclear. This uncertainty makes it difficult for individuals to know in advance whether their conduct is criminal, leaving the law open to arbitrary and inconsistent application.
The precedent set in Shaw was later confirmed in Knuller (Publishing, Printing and Promotions) Ltd v DPP [1973] AC 435, which concerned a magazine containing homosexual contact advertisements. While the House of Lords upheld the existence of the offence from Shaw, they also stated that the courts should not create any new offences or extend existing ones. This indicated a retreat from the broad judicial power asserted by Viscount Simonds, but the controversial offence itself remained part of English law, leaving a lasting legacy of the law's role in enforcing morality.
Conclusion
In conclusion, crime and morality are distinct concepts. Crime is defined by the state and enforced through the formal legal system, while morality is a more fluid and informal code of conduct. The two are not co-extensive; some crimes are not immoral, and many immoral acts are not crimes. The debate over the extent to which the law should enforce morality is a central tension in criminal law theory. The case of DPP v Shaw is a crucial illustration of this tension in practice. It stands as a powerful example of the judiciary adopting the role of a moral arbiter, using a broad and vague common law offence to punish conduct it found morally reprehensible. The impact of Shaw was to affirm the court's perceived duty to protect public morality, but in doing so, it raised fundamental constitutional questions about judicial law-making and undermined the principle of legal certainty. While subsequent case law has limited the judicial power to create new offences, Shaw remains a stark reminder of the enduring and complex relationship between the law of the land and the moral convictions of society.
References
Devlin, P. (1965) The Enforcement of Morals. Oxford University Press.
Director of Public Prosecutions v Shaw [1962] AC 220.
Gardner, J. (2007) Offences and Defences: Selected Essays in the Philosophy of Criminal Law. Oxford University Press.
Hart, H.L.A. (1963) Law, Liberty, and Morality. Stanford University Press.
Knuller (Publishing, Printing and Promotions) Ltd v DPP [1973] AC 435.
Mill, J.S. (1859) On Liberty. John W. Parker and Son.
Street Offences Act 1959.
