Role of Legislature in Criminal Lawmaking (UGC-NET Unit II)
UGC-NET Criminology Unit II notes on why the legislature, not courts or police, holds primary authority to criminalise conduct, the principles behind that choice, and the pressures that push lawmaking toward overcriminalisation.
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Unit II of the UGC-NET Criminology syllabus asks candidates to understand the legislature's role in making criminal law: how a legislature comes to declare an act a crime, what principles are used to justify that choice, and how the resulting statute moves from a first draft to an enacted law.
This sits at the front end of the criminal justice process, before coordination among criminal justice agencies even becomes relevant, since agencies can only act on offences the legislature has already defined.
This companion condenses the legislature's lawmaking role into an exam-ready form: why this power sits with elected bodies rather than judges, the four justifications used to defend a new offence, codification versus common-law incrementalism as methods of building a penal code, and the pressures, chiefly moral panics, that push legislatures toward criminalising more conduct than a slower process would. For the fuller comparative discussion across India, the United Kingdom, and the United States, read the linked book topic.
- Harm principle
- The idea, associated with John Stuart Mill, that the state may restrict a person's conduct through law only to prevent harm to other people, not merely to prevent harm to that person or to enforce a shared morality.
- Criminalisation
- The legislative act of declaring a category of conduct a criminal offence, usually by statute, and attaching a penal sanction to it.
- Overcriminalisation
- A pattern in which legislatures create so many offences, including minor regulatory ones, that the criminal law's reach outgrows its capacity to be enforced consistently.
- Codification
- Consolidating criminal law into a single systematic statute drafted in advance, as opposed to letting offences accumulate through individual judicial decisions over time.
- Moral panic
- A term coined by sociologist Stanley Cohen for an episode of intense, disproportionate public alarm about a group or activity, amplified by media coverage, that can push legislatures toward hurried new criminal law.
- Legal moralism
- The position, associated with Patrick Devlin, that the state may criminalise conduct simply because a society's shared moral code condemns it, even where no identifiable harm to another person is shown.
- Model Penal Code
- A model statute drafted by the American Law Institute and published in 1962, never itself binding law, but widely adapted by United States state legislatures when drafting their own penal codes.
Why the legislature, not the courts, defines crime
In a constitutional democracy, the power to declare an act a crime sits with the legislature, following the principle of legality, expressed as nullum crimen sine lege, nulla poena sine lege: there is no crime and no punishment without a pre-existing law. A person cannot be punished for conduct that was not defined as criminal when they did it.
India's Constitution enshrines this in Article 20(1), which bars conviction for an act that was not an offence under the law in force when it was committed.
Courts still play a role, but it is interpretive, not originating. Judges decide whether conduct falls within a statute's wording and test statutes against constitutional guarantees, but they do not, as a general rule, invent a wholly new offence that no statute already recognised. This separation is what keeps the reach of criminal law predictable rather than arbitrary, and it is the single most exam-relevant idea in this unit.
The principles that justify criminalisation
Four principles recur when a legislature is asked to justify a new offence. The harm principle, set out by John Stuart Mill in his 1859 essay On Liberty, holds that the only legitimate reason to interfere with a person's liberty is to prevent harm to others. Legal moralism, associated with Patrick Devlin, holds that the law may punish conduct a shared public morality condemns even without an identifiable victim.
Legal paternalism justifies criminalisation to protect a person from themselves, for example mandatory seatbelt laws, and the offence principle, developed by Joel Feinberg, justifies criminalising conduct that causes serious public offence or disgust even where no tangible harm occurs.
For NET, remember that most working penal codes mix all four rather than resting on one alone, with legal moralism playing the smallest role in liberal democracies today. A bill proposing a new offence is regularly defended in exactly this vocabulary, and identifying which principle a lawmaker is invoking is a common way this unit is tested.
Codification versus common-law incrementalism
A legislature can build criminal law two ways. Codification drafts a single systematic penal code in advance, stating offences, defences, and general principles together. India's Indian Penal Code, enacted in 1860, was an early large-scale example, and it was replaced by the Bharatiya Nyaya Sanhita in 2023, which restructured many of the same substantive offences while keeping the codified structure.
Common-law incrementalism, historically the English approach, instead lets offences accumulate case by case through judicial decisions before Parliament restates and supplements them by statute. England and Wales has never adopted a single comprehensive penal code.
The United States sits between the two: federal criminal law is scattered across Title 18 and other titles, while most states adopted structured codes heavily influenced by the Model Penal Code, a 1962 template that was never itself binding law but standardised concepts such as levels of criminal intent across jurisdictions.
Moral panics and overcriminalisation
Not every criminal statute follows a deliberate, committee-vetted path. Sociologist Stanley Cohen, in Folk Devils and Moral Panics (1972), described how media-amplified alarm about a group or activity can compress the ordinary legislative timeline and reduce committee scrutiny. The United Kingdom's Dangerous Dogs Act 1991, passed within weeks of tabloid coverage of dog attacks, is a frequently cited example, later criticised for being drafted too quickly.
The cumulative effect of moral panics, incremental codification, and organised lobbying is a long-run tendency toward overcriminalisation, since it is politically easier to add an offence than to remove one.
Courts and the executive also shape how a statute actually operates once enacted: India's Supreme Court read down part of Section 377 of the Indian Penal Code in 2018 through constitutional review, without Parliament itself amending the provision at that time, showing how the judiciary can narrow a legislature's criminal statute even while the legislature stays silent.
Under the principle of legality, which body holds primary authority to define a new criminal offence?
For UGC-NET, why does the legislature and not the courts define crime?
What is the harm principle in criminal lawmaking?
How is codification different from common-law lawmaking, for NET purposes?
What is a moral panic and why does NET test it under this unit?
Can the judiciary narrow a criminal law without the legislature acting?
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