Rehabilitation (penology) in the context of "Social integration"

Murder is the unlawful killing of another human without justification or valid excuse committed with the necessary intention as defined by the law in a specific jurisdiction. This state of mind may, depending upon the jurisdiction, distinguish murder from other forms of unlawful homicide, such as manslaughter. Manslaughter is killing committed in the absence of malice, such as in the case of voluntary manslaughter brought about by reasonable provocation, or diminished capacity. Involuntary manslaughter, where it is recognized, is a killing that lacks all but the most attenuated guilty intent, recklessness.

Most societies consider murder to be an extremely serious crime, and thus believe that a person convicted of murder should receive harsh punishments for the purposes of retribution, deterrence, rehabilitation, or incapacitation. In most countries, a person convicted of murder generally receives a long-term prison sentence, a life sentence, or capital punishment. Some countries, states, and territories, including the United Kingdom and other countries with English-derived common law, mandate life imprisonment for murder, whether it is subdivided into first-degree murder or otherwise.

Criminal law is the body of law that relates to crime. It proscribes conduct perceived as threatening, harmful, or otherwise endangering to the property, health, safety, and welfare of people inclusive of one's self. Most criminal law is established by statute, which is to say that the laws are enacted by a legislature. Criminal law includes the punishment and rehabilitation of people who violate such laws.

Criminal law varies according to jurisdiction, and differs from civil law, where emphasis is more on dispute resolutions or victim compensation, rather than on punishment or rehabilitation.

Criminal justice is the delivery of justice when a crime is committed. The criminal justice system is a series of government agencies and institutions. Goals include retribution, reformation and rehabilitation of offenders, preventing other crimes, and support for victims. The primary institutions of the criminal justice system are the police, prosecution and defense lawyers, the courts and the prisons system.

Retributive justice is a legal concept whereby the criminal offender receives punitive damages proportional or similar to the crime. As opposed to revenge, retribution—and thus retributive justice—is not personal, is directed only at wrongdoing, has inherent limits, involves no pleasure at the suffering of others (e.g., schadenfreude, sadism), and employs procedural standards. Retributive justice contrasts with other purposes of punishment such as deterrence (prevention of future crimes), exile (prevention of opportunity) and rehabilitation of the offender.

The concept is found in most world cultures and in many ancient texts. Classical texts advocating the retributive view include Cicero's De Legibus (1st century BC), Immanuel Kant's Science of Right (1790), and Georg Wilhelm Friedrich Hegel's Elements of the Philosophy of Right (1821). The presence of retributive justice in ancient Jewish culture is shown by its mention in the law of Moses, which refers to the punishments of "life for life, eye for eye, tooth for tooth, hand for hand, foot for foot" as also attested in the Code of Hammurabi. Documents assert similar values in other cultures, though the judgment of whether a particular punishment is appropriately severe can vary greatly across cultures and individuals in accord with circumstance.

Deterrence in relation to criminal offending is the idea or theory that the threat of punishment will deter people from committing crime and reduce the probability and/or level of offending in society. It is one of five objectives that punishment is thought to achieve; the other four objectives are denunciation, incapacitation (for the protection of society), retribution and rehabilitation.

Criminal deterrence theory has two possible applications: the first is that punishments imposed on individual offenders will deter or prevent that particular offender from committing further crimes; the second is that public knowledge that certain offences will be punished has a generalised deterrent effect which prevents others from committing crimes.

Community sentence or alternative sentencing or non-custodial sentence is a collective name in criminal justice for all the different ways in which courts can punish a defendant who has been convicted of committing an offense, other than through a custodial sentence (serving a jail or prison term) or capital punishment (death).

Traditionally, the theory of retributive justice is based on the ideas of retaliation (punishment), which is valuable in itself, and also provides deterrent. Before the police, sentences of execution or imprisonment were thought pretty efficient at this, while at the same time removing the threat criminals pose to the public (protection). Alternative sentences add to these goals, trying to reform the offender (rehabilitation), and put right what they did (reparation).