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In ordinary language, a crime is an unlawful act punishable by a state or other authority. The term "crime" does not, in modern criminal law, have any simple and universally accepted definition, though statutory definitions have been provided for certain purposes. The most popular view is that crime is a category created by law; in other words, something is a crime if declared as such by the relevant and applicable law. One proposed definition is that a crime or offence (or criminal offence) is an act harmful not only to some individual but also to a community, society or the state ("a public wrong"). Such acts are forbidden and punishable by law.
 
The notion that acts such as murder, rape and theft are to be prohibited exists worldwide. What precisely is a criminal offence is defined by criminal law of each country. While many have a catalogue of crimes called the criminal code, in some common law countries no such comprehensive statute exists.

The state (government) has the power to severely restrict one's liberty for committing a crime. In modern societies, there are procedures to which investigations and trials must adhere. If found guilty, an offender may be sentenced to a form of reparation such as a community sentence, or, depending on the nature of their offence, to undergo imprisonment, life imprisonment or, in some jurisdictions, execution.

Usually, to be classified as a crime, the "act of doing something criminal" (actus reus) must – with certain exceptions – be accompanied by the "intention to do something criminal" (mens rea).

While every crime violates the law, not every violation of the law counts as a crime. Breaches of private law (torts and breaches of contract) are not automatically punished by the state, but can be enforced through civil procedure.

Overview

When informal relationships prove insufficient to establish and maintain a desired social order, a government or a state may impose more formalized or stricter systems of social control. With institutional and legal machinery at their disposal, agents of the State can compel populations to conform to codes and can opt to punish or attempt to reform those who do not conform.

Authorities employ various mechanisms to regulate (encouraging or discouraging) certain behaviors in general. Governing or administering agencies may for example codify rules into laws, police citizens and visitors to ensure that they comply with those laws, and implement other policies and practices that legislators or administrators have prescribed with the aim of discouraging or preventing crime. In addition, authorities provide remedies and sanctions, and collectively these constitute a criminal justice system. Legal sanctions vary widely in their severity; they may include (for example) incarceration of temporary character aimed at reforming the convict. Some jurisdictions have penal codes written to inflict permanent harsh punishments: legal mutilation, capital punishment or life without parole.

Usually, a natural person perpetrates a crime, but legal persons may also commit crimes. Conversely, at least under U.S. law, nonpersons such as animals cannot commit crimes.

The sociologist Richard Quinney has written about the relationship between society and crime. When Quinney states "crime is a social phenomenon" he envisages both how individuals conceive crime and how populations perceive it, based on societal norms.

Etymology

The word crime is derived from the Latin root cernō, meaning "I decide, I give judgment". Originally the Latin word crīmen meant "charge" or "cry of distress." The Ancient Greek word krima (κρίμα), from which the Latin cognate derives, typically referred to an intellectual mistake or an offense against the community, rather than a private or moral wrong.

In 13th century English crime meant "sinfulness", according to etymonline.com. It was probably brought to England as Old French crimne (12th century form of Modern French crime), from Latin crimen (in the genitive case: criminis). In Latin, crimen could have signified any one of the following: "charge, indictment, accusation; crime, fault, offense".

The word may derive from the Latin cernere – "to decide, to sift" (see crisis, mapped on Kairos and Chronos). But Ernest Klein (citing Karl Brugmann) rejects this and suggests *cri-men, which originally would have meant "cry of distress". Thomas G. Tucker suggests a root in "cry" words and refers to English plaint, plaintiff, and so on. The meaning "offense punishable by law" dates from the late 14th century. The Latin word is glossed in Old English by facen, also "deceit, fraud, treachery", [cf. fake]. Crime wave is first attested in 1893 in American English.

Definition

England and Wales

Whether a given act or omission constitutes a crime does not depend on the nature of that act or omission. It depends on the nature of the legal consequences that may follow it. An act or omission is a crime if it is capable of being followed by what are called criminal proceedings.

History

The following definition of "crime" was provided by the Prevention of Crimes Act 1871, and applied for the purposes of section 10 of the Prevention of Crime Act 1908:
The expression "crime" means, in England and Ireland, any felony or the offence of uttering false or counterfeit coin, or of possessing counterfeit gold or silver coin, or the offence of obtaining goods or money by false pretences, or the offence of conspiracy to defraud, or any misdemeanour under the fifty-eighth section of the Larceny Act, 1861.

Scotland

For the purpose of section 243 of the Trade Union and Labour Relations (Consolidation) Act 1992, a crime means an offence punishable on indictment, or an offence punishable on summary conviction, and for the commission of which the offender is liable under the statute making the offence punishable to be imprisoned either absolutely or at the discretion of the court as an alternative for some other punishment.

Sociology

A normative definition views crime as deviant behavior that violates prevailing norms – cultural standards prescribing how humans ought to behave normally. This approach considers the complex realities surrounding the concept of crime and seeks to understand how changing social, political, psychological, and economic conditions may affect changing definitions of crime and the form of the legal, law-enforcement, and penal responses made by society.

These structural realities remain fluid and often contentious. For example: as cultures change and the political environment shifts, societies may criminalise or decriminalise certain behaviours, which directly affects the statistical crime rates, influence the allocation of resources for the enforcement of laws, and (re-)influence the general public opinion.

Similarly, changes in the collection and/or calculation of data on crime may affect the public perceptions of the extent of any given "crime problem". All such adjustments to crime statistics, allied with the experience of people in their everyday lives, shape attitudes on the extent to which the State should use law or social engineering to enforce or encourage any particular social norm. Behaviour can be controlled and influenced by a society in many ways without having to resort to the criminal justice system.

Indeed, in those cases where no clear consensus exists on a given norm, the drafting of criminal law by the group in power to prohibit the behaviour of another group may seem to some observers an improper limitation of the second group's freedom, and the ordinary members of society have less respect for the law or laws in general – whether the authorities actually enforce the disputed law or not.

Other definitions

Legislatures can pass laws (called mala prohibita) that define crimes against social norms. These laws vary from time to time and from place to place: note variations in gambling laws, for example, and the prohibition or encouragement of duelling in history. Other crimes, called mala in se, count as outlawed in almost all societies, (murder, theft and rape, for example).

English criminal law and the related criminal law of Commonwealth countries can define offences that the courts alone have developed over the years, without any actual legislation: common law offences. The courts used the concept of malum in se to develop various common law offences.

Criminalization