delivered the opinion of the Court.

The question presented is whether the fact that the Connecticut Board of Pardons has granted approximately three-fourths of the applications for commutation of life sentences creates a constitutional “liberty interest” or “entitlement” in life-term inmates so as to require that Board to explain its reasons for denial of an application for commutation.

*460I

In 1964, respondent Dumschat was sentenced to life imprisonment for murder. Under state law, he was not eligible for parole until December 1983.1 The Connecticut Board of Pardons is empowered to commute the sentences of life inmates by reducing the minimum prison term,2 and such a commutation accelerates eligibility for parole.3 The authority of the Board of Pardons derives from Conn. Gen. Stat. § 18-26 (1981), which provides in pertinent part:

“(a) Jurisdiction over the granting of, and the authority to grant, commutations of punishment or releases, conditioned or absolute, in the case of any person convicted of any offense against the state and commutations from the penalty of death shall be vested in the board of pardons.

“(b) Said board shall have authority to grant pardons, conditioned or absolute, for any offense against the state at any time after the imposition and before or after the service of any sentence.”

*461On several occasions prior to the filing of this suit in February 1976, Dumschat applied for a commutation of his sentence. The Board rejected each application without explanation. Dumschat then sued the Board under 42 U. S. C. § 1983, seeking a declaratory judgment that the Board’s failure to provide him with a written statement of reasons for denying commutation violated his rights guaranteed by the Due Process Clause of the Fourteenth Amendment.

After hearing testimony from officials of the Board of Pardons and the Board of Parole, the District Court concluded (a) that Dumschat had a constitutionally protected liberty entitlement in the pardon process, and (b) that his due process rights had been violated when the Board of Pardons failed to give “a written statement of reasons and facts relied on” in denying commutation. 432 F. Supp. 1310, 1315 (1977). The court relied chiefly on a showing that “at least 75 percent of all lifers received some favorable action from the pardon board prior to completing their minimum sentences” and that virtually all of the pardoned inmates were promptly paroled.4 Id., at 1314. In response to postjudgment motions, the District Court allowed other life inmates to intervene, certified the suit as a class action, and heard additional evidence.5 *462The court held that all prisoners serving life sentences in Connecticut state prisons have a constitutionally protected expectancy of commutation and therefore that they have a right to a statement of reasons when commutation is not granted. The Court of Appeals affirmed. 593 F. 2d 165 (CA2 1979). A petition for a writ of certiorari was filed, and we vacated and remanded for reconsideration in light of Greenholtz v. Nebraska Penal Inmates, 442 U. S. 1 (1979). 442 U. S. 926 (1979).

On remand, the Court of Appeals reaffirmed its original decision, 618 F. 2d 216 (CA2 1980), stating:

“In marked contrast [to the Nebraska statute considered in Oreenholtz], Connecticut’s pardons statute contains neither a presumption in favor of pardon nor a list of factors to be considered by the Board of Pardons. Instead, the statute grants the board unfettered discretion in the exercise of its power. The statute offers only the 'mere hope’ of pardon; it does not create a legitimate expectation of freedom and therefore does not implicate due process.” Id., at 219 (citation omitted).

The Court of Appeals also noted that the District Court’s holding that the mere possibility of a pardon creates a constitutionally cognizable liberty interest or entitlement was “no longer tenable” in light of Greenholtz. 618 F. 2d, at 221; see 442 U. S., at 8-11. However, the Court of Appeals then proceeded to conclude that “[t]he overwhelming likelihood that Connecticut life inmates will be pardoned and released before they complete their minimum terms gives them a constitutionally protected liberty interest in pardon pro*463ceedings.” 618 F. 2d, at 220. The Court of Appeals also understood our opinion in Greenholtz to hold that under the Due Process Clause, a brief statement of reasons is “not only constitutionally sufficient but also constitutionally necessary.”6 618 F. 2d, at 222. On that reading of Greenholtz, the case was remanded to the District Court for a determination of “how many years life inmates must serve before the probability of pardon becomes so significant as to give rise to a protected liberty interest.”7

II

A

A state-created right can, in some circumstances, beget yet other rights to procedures essential to the realization of the parent right. See Meachum v. Fano, 427 U. S. 215, 226 (1976); Wolff v. McDonnell, 418 U. S. 539, 557 (1974). Plainly, however, the underlying right must have come into existence before it can trigger due process protection. See, e. g., Leis v. Flynt, 439 U. S. 438, 442-443 (1979).

In Greenholtz, far from spelling out any judicially divined “entitlement,” we did no more than apply the unique Nebraska statute. We rejected the claim that a constitutional entitlement to release from a valid prison sentence exists in-*464dependency of a right explicitly conferred by the State. Our language in Greenholtz leaves no room for doubt:

“There is no constitutional or inherent right of a convicted person to be conditionally released before the expiration of a valid sentence. The natural desire of an individual to be released is indistinguishable from the initial resistance to being confined. But the conviction, with all its procedural safeguards, has extinguished that liberty right: ‘[G]iven a valid conviction, the criminal defendant has been constitutionally deprived of his liberty.’ ” 442 U. S., at 7 (emphasis supplied; citation omitted).

Greenholtz pointedly distinguished parole revocation and probation revocation cases,8 noting that there is a “critical” difference between denial of a prisoner’s request for initial release on parole and revocation of a parolee’s conditional liberty. Id., at 9-11, quoting, inter alia, Friendly, “Some Kind of Hearing,” 123 U. Pa. L. Rev. 1267, 1296 (1975). Unlike probation, pardon and commutation decisions have not traditionally been the business of courts; as such, they are rarely, if ever, appropriate subjects for judicial review.9 Cf. Meachum v. Fano, supra, at 225.

A decision whether to commute a long-term sentence generally depends not simply on objective factfinding, but also on purely subjective evaluations and on predictions of future behavior by those entrusted with the decision. A commutation decision therefore shares some of the characteristics of a decision whether to grant parole. See Greenholtz, 442 U. S., at 9-10. Far from supporting an “entitlement,” Greenholtz therefore compels the conclusion that an inmate has “no constitutional or inherent right” to commutation of his sentence.

*465Respondents nevertheless contend that the Board’s consistent practice of granting commutations to most life inmates is sufficient to create a protectible liberty interest. They argue:

“[T]he State Board has created an unwritten common law of sentence commutation and parole acceleration for Connecticut life inmates. ... In effect, there is an unspoken understanding between the State Board and inmates. The terms are simple: If the inmate cooperates with the State, the State will exercise its parole power on the inmate’s behalf. Both the State and the inmate recognize those terms. Each expects the other to abide by them.” Brief for Respondents 17-18.

This case does not involve parole, and respondents’ argument wholly misconceives the nature of a decision by a state to commute the sentence of a convicted felon. The petition in each case is nothing more than an appeal for clemency. See Schick v. Reed, 419 U. S. 256, 260-266 (1974). In terms of the Due Process Clause, a Connecticut felon’s expectation that a lawfully imposed sentence will be commuted or that he .will be pardoned is no more substantial than an inmate’s expectation, for example, that he will not be transferred to another prison;10 it is simply a unilateral hope. Greenholtz, supra, at 11; see Leis v. Flynt, 439 U. S., at 443-444. A constitutional entitlement cannot “be created — as if by estoppel — merely because a wholly and expressly discretionary state privilege has been granted generously in the past.” Id., at 444, n. 5. No matter how frequently a particular form of clemency has been granted, the statistical probabilities standing alone generate no constitutional protections; a contrary conclusion would trivialize the Constitution. The ground for a constitutional claim, if any, must be found in statutes or other rules defining the obligations of the authority charged with exercising clemency.

*466B

The Court of Appeals correctly recognized that Connecticut has conferred “unfettered discretion” on its Board of Pardons, but — paradoxically—then proceeded to fetter the Board with a halter of constitutional “entitlement.” The statute imposes no limit on what procedure is to be followed, what evidence may be considered, or what criteria are to be applied by the Board. Respondents challenge the Board’s procedure precisely because of “the absence of any apparent standards.” Brief for Respondents 28. We agree that there are no explicit standards by way of statute, regulation, or otherwise.

This contrasts dramatically with the Nebraska statutory procedures in Greenholtz, which expressly mandated that the Nebraska Board of Parole “shall” order the inmate’s release “unless” it decided that one of four specified reasons for denial was applicable. 442 U. S., at 11. The Connecticut commutation statute, having no definitions, no criteria, and no mandated “shalls,” creates no analogous duty or constitutional entitlement.

It is clear that the requirement for articulating reasons for denial of parole in Greenholtz derived from unique mandates of the Nebraska statutes. Thus, although we noted that under the terms of the Nebraska statute, the inmates’ expectancy of parole release “is entitled to some measure of constitutional protection,” we emphasized that

“this statute has unique structure and language and thus whether any other state statute provides a protectible entitlement must be decided on a case-by-case basis.” Id., at 12.

Moreover, from the standpoint of a reasons requirement, there is a vast difference between a denial of parole — particularly on the facts of Greenholtz — and a state’s refusal to commute a lawful sentence. When Nebraska statutes directed that inmates who are eligible for parole “shall” be released “unless” *467a certain finding has been made, the statutes created a right. By contrast, the mere existence of a power to commute a lawfully imposed sentence, and the granting of commutations to many petitioners, create no right or “entitlement.” A state cannot be required to explain its reasons for a decision when it is not required to act on prescribed grounds.

We hold that the power vested in the Connecticut Board of Pardons to commute sentences conferred no rights on respondents beyond the right to seek commutation.

Reversed.

concurring.

I join the Court’s opinion. Although respondents have demonstrated a statistical likelihood of obtaining the relief they request, that is not enough to create a protectible liberty interest. Rather, respondents must also show — by reference to statute, regulation, administrative practice, contractual arrangement or other mutual understanding — that particularized standards or criteria guide the State’s decisionmakers. See Leis v. Flynt, 439 U. S. 438, 442 (1979); Perry v. Sindermann, 408 U. S. 593, 601 (1972); Board of Regents v. Roth, 408 U. S. 564, 577 (1972). The structure of the State’s decisionmaking process is thus as significant as the likely result of that process. Respondents have not shown that the Board is required to base its decisions on objective and defined criteria. As in Meachum, v. Fano, 427 U. S. 215, 228 (1976), the decisionmaker can deny the requested relief for any constitutionally permissible reason or for no reason at all. Accordingly, I agree that respondents have no protectible liberty interest in a pardon.

concurring.

I join the Court’s opinion and write separately only to observe that neither Wolff v. McDonnell, 418 U. S. 539 (1974), nor Meachum v. Fano, 427 U. S. 215 (1976), suggested that state law is the only source of a prisoner’s liberty worthy of *468federal constitutional protection. The opinion in Wolff v. McDonnell pointed out that although a prisoner’s “rights may be diminished by the needs and exigencies of the institutional environment, [he] is not wholly stripped of constitutional protections when he is imprisoned for crime. . . . [He] may not be deprived of life, liberty or property without due process of law.” 418 U. S., at 555-556. The issue in the case was the deprivation of the right to good-time credits, a right which was not guaranteed by the Federal Constitution but was a creation of state law. Wolff held that even such a liberty interest rooted in state law was entitled to constitutional protection.

Meachum v. Fano also pointed out that “the convicted felon does not forfeit all constitutional protections by reason of his conviction and confinement in prison. He retains a variety of important rights that the courts must be alert to protect.” 427 U. S., at 225. The Court went on to hold that a state prisoner has no federal constitutional right protecting him against administrative transfers to another state prison. Neither did state law purport to create a liberty interest entitled to protection under the Fourteenth Amendment. Of course, Justice Stevens was in dissent in that case; but even there he recognized that the Court’s opinion first addressed whether the right asserted was one of the liberty interests retained by convicted felons. We decided that it was not; he thought that it was. But neither Wolff nor Meachum is fairly characterized as suggesting that all liberty interests entitled to constitutional protection must be found in state law.

dissenting.

“Liberty from bodily restraint always has been recognized as the core of the liberty protected by the Due Process Clause from arbitrary governmental action.” Greenholtz v. Nebraska Penal Inmates, 442 U. S. 1, 18 (opinion of Powell, J.). *469The liberty that is worthy of constitutional protection is not merely “a statutory creation of the State,” Wolff v. McDonnell, 418 U. S. 539, 558. Surely the Court stumbles when it states that liberty “must be found in statutes or other rules defining the obligations of the authority charged with exercising clemency,” ante, at 465, or when it implies that liberty has “its roots in state law,” Meachum v. Fano, 427 U. S. 215, 226.

To some of us, it is “self-evident” that individual liberty has far deeper roots.1 Moreover, the deprivation of liberty that follows conviction of a criminal offense is not total; the individual possesses a residuum of constitutionally protected liberty even while he is in the legal custody of the State/2 The question this case presents is not whether these respondents are mere slaves, wholly divested of any constitutionally protected interest in liberty; rather, the question is whether the decision by the Connecticut Board of Pardons refusing to commute their life sentences constitutes a deprivation of liberty entitling respondents to the protection of the Due Process Clause.

*470The facile answer to that question is that the distinction between a refusal to grant freedom on the one hand and the imposition of a sentence or the revocation of a parole on the other forms the basis for a determination whether due process is implicated. Only the imposition of sentence or revocation of parole is obviously a deprivation of liberty. But in practice, as Justice Powell has explained, that distinction is far less satisfactory than it first appears.3 In my judgment, it provides an insufficient answer to the question presented by this case because the distinction does not correctly evaluate the character of the deprivation of liberty that occurs when a person is convicted of a crime.

If the conviction were effective to terminate the defendant’s liberty, he would thereafter retain no constitutional right to procedural safeguards against arbitrary action. The process of sentencing, parole release, parole revocation, and ultimate discharge could all be totally arbitrary. But no State asserts such total control over the convicted offender, and this Court has unequivocally held that the Constitution affords protection at different stages of the postconviction *471process.4 The basic reason the constitutional protection applies at these stages is that liberty itself survives to some extent and its deprivation is a continuous process rather than an isolated event.

This case involves the State of Connecticut’s process for determining when a relatively small group of serious offenders will be released from custody. Routinely that process includes three determinations: the judge imposes a life sentence; the Board of Pardons in due course commutes that sentence; and finally the Board of Parole discharges the prisoner from custody. Each of these three decisions is a regular and critical component of the decisionmaking process employed by the State of Connecticut to determine the magnitude of its deprivation of the prisoner’s liberty.5 In my opinion the Due Process Clause applies to each step and denies the State the power to act arbitrarily.6

*472Whether the refusal to provide the inmates with a statement of reasons is a procedural shortcoming of constitutional magnitude is, admittedly, fairly debatable. Judges often decide difficult and important cases without explaining their reasons, and I would not suggest that they thereby commit constitutional error. But the ordinary litigant has other substantial procedural safeguards against arbitrary decision-making in the courtroom. The prison inmate has few such protections. Indeed, as in this case, often he is not even afforded the protection of written standards to govern the exercise of the powers of the Board of Pardons. His protection is somewhat analogous to that of the litigant in the earliest days of our common-law history. The judges then were guided by few written laws, but developed a meaningful set of rules by the process of case-by-case adjudication. Their explanations of why they decided cases as they did provided guideposts for future decisions and an assurance to litigants that like cases were being decided in a similar way. Many of us believe that those statements of reasons provided a better guarantee of justice than could possibly have been described in a code written in sufficient detail to be fit for Napoleon.

As Justice Marshall has pointed out, “the obligation to justify a decision publicly would provide the assurance, critical to the appearance of fairness that the Board’s decision is not capricious,” see Greenholtz, 442 U. S., at 40 (dissenting opinion). I therefore believe the Court of Appeals correctly concluded that in this context a brief statement of reasons is an essential element of the process that is due these respondents.

Accordingly, I respectfully dissent.