announced the judgment of the Court and delivered an opinion, in which Justice Stevens, Justice Souter, and Justice Ginsburg join.
This case presents the question whether the Due Process Clause of the Fourteenth Amendment was violated by the refusal of a state trial court to instruct the jury in the penalty phase of a capital trial that under state law the defendant was ineligible for parole. We hold that where the defendant’s future dangerousness is at issue, and state law prohibits the defendant’s release on parole, due process requires that the sentencing jury be informed that the defendant is parole ineligible.
I
A
In July 1990, petitioner beat to death an elderly woman, Josie Lamb, in her home in Columbia, South Carolina. The week before petitioner’s capital murder trial was scheduled to begin, he pleaded guilty to first-degree burglary and two counts of criminal sexual conduct in connection with two prior assaults on elderly women. Petitioner’s guilty pleas resulted in convictions for violent offenses, and those convictions rendered petitioner ineligible for parole if convicted of any subsequent violent-crime offense. S. C. Code Ann. §24-21-640 (Supp. 1993).
Prior to jury selection, the prosecution advised the trial judge that the State “[o]bviously [was] going to ask you to exclude any mention of parole throughout this trial.” App. 2. Over defense counsel’s objection, the trial court granted the prosecution’s motion for an order barring the *157defense from asking any question during voir dire regarding parole. Under the court’s order, defense counsel was forbidden even to mention the subject of parole, and expressly was prohibited from questioning prospective jurors as to whether they understood the meaning of a “life” sentence under South Carolina law.1 After a 3-day trial, petitioner was convicted of the murder of Ms. Lamb.
During the penalty phase, the defense brought forward mitigating evidence tending to show that petitioner’s violent behavior reflected serious mental disorders that stemmed from years of neglect and extreme sexual and physical abuse petitioner endured as an adolescent. While there was some disagreement among witnesses regarding the extent to which petitioner’s mental condition properly could be deemed a “disorder,” witnesses for both the defense and the prosecution agreed that petitioner posed a continuing danger to elderly women.
In its closing argument the prosecution argued that petitioner’s future dangerousness was a factor for the jury to consider when fixing the appropriate punishment. The question for the jury, said the prosecution, was “what to do with [petitioner] now that he is in our midst.” Id., at 110. The prosecution further urged that a verdict for death would be “a response of society to someone who is a threat. Your verdict will be an act of self-defense.” Ibid.
Petitioner sought to rebut the prosecution’s generalized argument of future dangerousness by presenting evidence that, due to his unique psychological problems, his dangerousness was limited to elderly women, and that there was no reason to expect further acts of violence once he was isolated in a prison setting. In support of his argument, petitioner introduced testimony from a female medical assistant and *158from two supervising officers at the Richland County jail where petitioner had been held prior to trial. All three testified that petitioner had adapted well to prison life during his pretrial confinement and had not behaved in a violent manner toward any of the other inmates or staff. Petitioner also offered expert opinion testimony from Richard L. Boyle, a clinical social worker and former correctional employee, who had reviewed and observed petitioner’s institutional adjustment. Mr. Boyle expressed the view that, based on petitioner’s background and his current functioning, petitioner would successfully adapt to prison if he was sentenced to life imprisonment.
Concerned that the jury might not understand that “life imprisonment” did not carry with it the possibility of parole in petitioner’s case, defense counsel asked the trial judge to clarify this point by defining the term “life imprisonment” for the jury in accordance with S. C. Code Ann. § 24-21-640 (Supp. 1993).2 To buttress his request, petitioner proffered, outside the presence of the jury, evidence conclusively establishing his parole ineligibility. On petitioner’s behalf, attorneys for the South Carolina Department of Corrections and the Department of Probation, Parole and Pardons testified that any offender in petitioner’s position was in fact ineligible for parole under South Carolina law. The prosecution did not challenge or question petitioner’s parole ineligibility. Instead, it sought to elicit admissions from the witnesses that, notwithstanding petitioner’s parole ineligibility, petitioner might receive holiday furloughs or other forms of early release. Even this effort was unsuccessful, however, *159as the cross-examination revealed that Department of Corrections regulations prohibit petitioner’s release under early release programs such as work-release or supervised furloughs, and that no convicted murderer serving life without parole ever had been furloughed or otherwise released for any reason.
Petitioner then offered into evidence, without objection, the results of a statewide public-opinion survey conducted by. the University of South Carolina’s Institute for Public Affairs. The survey had been conducted a few days before petitioner’s trial, and showed that only 7.1 percent of all jury-eligible adults who were questioned firmly believed that an inmate sentenced to life imprisonment in South Carolina actually would be required to spend the rest of his life in prison. See App. 152-154. Almost half of those surveyed believed that a convicted murderer might be paroled within 20 years; nearly three-quarters thought that release certainly would- occur in less than 30 years. Ibid. More than 75 percent of those surveyed indicated that if they were called upon to make a capital sentencing decision as jurors, the amount of time the convicted murderer actually would have to spend in prison would be an “extremely important” or a “very important” factor in choosing between life and death. Id., at 155.
Petitioner argued that, in view of the public’s apparent misunderstanding about the meaning of “life imprisonment” in South Carolina, there was a reasonable likelihood that the jurors would vote for death simply because they believed, mistakenly, that petitioner eventually would be released on parole.
The prosecution opposed the proposed instruction, urging the court “not to allow ... any argument by state or defense about parole and not charge the jury on anything concerning parole.” Id., at 37. Citing the South Carolina Supreme Court’s opinion in State v. Torrence, 305 S. C. 45, 406 S. E. *1602d 315 (1991), the trial court refused petitioner’s requested instruction. Petitioner then asked alternatively for the following instruction:
“I charge you that these sentences mean what they say. That is, if you recommend that the defendant Jonathan Simmons be sentenced to death, he actually will be sentenced to death and executed. If, on the other hand, you recommend that he be sentenced to life imprisonment, he actually will be sentenced to imprisonment in the state penitentiary for the balance of his natural life.
“In your deliberations, you are not to speculate that these sentences mean anything other than what I have just told you, for what I have told you is exactly what will happen to the defendant, depending on what your sentencing decision is.” App. 162.
The trial judge also refused to give this instruction, but indicated that he might give a similar instruction if the jury inquired about parole eligibility.
After deliberating on petitioner’s sentence for 90 minutes, the jury sent a note to the judge asking a single question: “Does the imposition of a life sentence carry with it the possibility of parole?” Id., at 145. Over petitioner’s objection, the trial judge gave the following instruction:
“You are instructed not to consider parole or parole eligibility in reaching your verdict. Do not consider parole or parole eligibility. That is not a proper issue for your consideration. The terms life imprisonment and death sentence are to be understood in their plan [sic] and ordinary meaning.” Id., at 146.
Twenty-five minutes after receiving this response from the court, the jury returned to the courtroom with a sentence of death.
On appeal to the South Carolina Supreme Court, petitioner argued that the trial judge’s refusal to provide the jury accurate information regarding his parole ineligibil*161ity violated the Eighth Amendment and the Due Process Clause of the Fourteenth Amendment.3 The South Carolina Supreme Court declined to reach the merits of petitioner’s challenges. With one justice dissenting, it concluded that, regardless of whether a trial court’s refusal to inform a sentencing jury about a defendant’s parole ineligibility might be error under some circumstances, the instruction given to petitioner’s jury “satisfie[d] in substance [petitioner’s] request for a charge on parole ineligibility,” and thus there was no reason to consider whether denial of such an instruction would be constitutional error in this case. 310 S. C. 439, 444, 427 S. E. 2d 175, 179 (1993). We granted certiorari, 510 U. S. 811 (1993).
II
The Due Process Clause does not allow the execution of a person “on the basis of information which he had no opportunity to deny or explain.” Gardner v. Florida, 430 U. S. 349, 362 (1977). In this case, the jury reasonably may have believed that petitioner could be released on parole if he were not executed. To the extent this misunderstanding pervaded the jury’s deliberations, it had the effect of creating a false choice between sentencing petitioner to death and sentencing him to a limited period of incarceration. This *162grievous misperception was encouraged by the trial court’s refusal to provide the jury with accurate information regarding petitioner’s parole ineligibility, and by the State’s repeated suggestion that petitioner would pose a future danger to society if he were not executed. Three times petitioner asked to inform the jury that in fact he was ineligible for parole under state law; three times his request was denied. The State thus succeeded in securing a death sentence on the ground, at least in part, of petitioner’s future dangerousness, while at the same time concealing from the sentencing jury the true meaning of its noncapital sentencing alternative, namely, that life imprisonment meant life without parole. We think it is clear that the State denied petitioner due process.4
A
This Court has approved the jury’s consideration of future dangerousness during the penalty phase of a capital trial, recognizing that a defendant’s future dangerousness bears on all sentencing determinations made in our criminal justice system. See Jurek v. Texas, 428 U. S. 262, 275 (1976) (joint opinion of Stewart, Powell, and Stevens, JJ.) (noting that “any sentencing authority must predict a convicted person’s probable future conduct when it engages in the process of determining what punishment to impose”); California v. Ramos, 463 U. S. 992, 1003, n. 17 (1983) (explaining that it is proper for a sentencing jury in a capital case to consider “the defendant’s potential for reform and whether his probable future behavior counsels against the desirability of his release into society”).
Although South Carolina statutes do not mandate consideration of the defendant’s future dangerousness in capital sentencing, the State’s evidence in aggravation is not limited to evidence relating to statutory aggravating circumstances. *163See Barclay v. Florida, 463 U. S. 939, 948-951 (1983) (plurality opinion); California v. Ramos, 463 U. S., at 1008 (“Once the jury finds that the defendant falls within the legislatively defined category of persons eligible for the death penalty ... the jury then is free to consider a myriad of factors to determine whether death is the appropriate punishment”). Thus, prosecutors in South Carolina, like those in other States that impose the death penalty, frequently emphasize a defendant’s future dangerousness in their evidence and argument at the sentencing phase; they urge the jury to sentence the defendant to death so that he will not be a danger to the public if released from prison. Eisenberg & Wells, Deadly Confusion: Juror Instructions in Capital Cases, 79 Cornell L. Rev. 1, 4 (1993).
Arguments relating to a defendant’s future dangerousness ordinarily would be inappropriate at the guilt phase of a trial, as the jury is not free to convict a defendant simply because he poses a future danger; nor is a defendant’s future dangerousness likely relevant to the question whether each element of an alleged offense has been proved beyond a reasonable doubt. But where the jury has sentencing responsibilities in a capital trial, many issues that are irrelevant to the guilt-innocence determination step into the foreground and require consideration at the sentencing phase. The defendant’s character, prior criminal history, mental capacity, background, and age are just a few of the many factors, in addition to future dangerousness, that a jury may consider in fixing appropriate punishment. See Lockett v. Ohio, 438 U. S. 586 (1978); Eddings v. Oklahoma, 455 U. S. 104, 110 (1982); Barclay v. Florida, 463 U. S., at 948-951.
In assessing future dangerousness, the actual duration of the defendant’s prison sentence is indisputably relevant. Holding all other factors constant, it is entirely reasonable for a sentencing jury to view a defendant who is eligible for parole as a greater threat to society than a defendant who is not. Indeed, there may be no greater assurance of a defend*164ant’s future nondangerousness to the public than the fact that he never will be released on parole. The trial court’s refusal to apprise the jury of information so crucial to its sentencing determination, particularly when the prosecution alluded to the defendant’s future dangerousness in its argument to the jury, cannot be reconciled with our well-established precedents interpreting the Due Process Clause.
B
In Skipper v. South Carolina, 476 U. S. 1 (1986), this Court held that a defendant was denied due process by the refusal of the state trial court to admit evidence of the defendant’s good behavior in prison in the penalty phase of his capital trial. Although the majority opinion stressed that the defendant’s good behavior in prison was “relevant evidence in mitigation of punishment,” and thus admissible under the Eighth Amendment, id., at 4, citing Lockett v. Ohio, 438 U. S., at 604 (plurality opinion), the Skipper opinion expressly noted that the Court’s conclusion also was compelled by the Due Process Clause. The Court explained that where the prosecution relies on a prediction of future dangerousness in requesting the death penalty, elemental due process principles operate to require admission of the defendant’s relevant evidence in rebuttal. 476 U. S., at 5, n. 1. See also id., at 9 (Powell, J., opinion concurring in judgment) (“[Bjecause petitioner was not allowed to rebut evidence and argument used against him,” the defendant clearly was denied due process).
The Court reached a similar conclusion in Gardner v. Florida, 430 U. S. 349 (1977). In that case, a defendant was sentenced to death on the basis of a presentence report which was not made available to him and which he therefore could not rebut. A plurality of the Court explained that sending a man to his death “on the basis of information which he had no opportunity to deny or explain” violated fundamental notions of due process. Id., at 362. The principle an*165nounced in Gardner was reaffirmed in Skipper, and it compels our decision today. See also Crane v. Kentucky, 476 U. S. 683, 690 (1986) (due process entitles a defendant to “ ‘a meaningful opportunity to present a complete defense’ ”) (citation omitted); Ake v. Oklahoma, 470 U. S. 68, 83-87 (1985) (where the State presents psychiatric evidence of a defendant’s future dangerousness at a capital sentencing proceeding, due process entitles an indigent defendant to the assistance of a psychiatrist for the development of his defense).
Like the defendants in Skipper and Gardner, petitioner was prevented from rebutting information that the sentencing authority considered, and upon which it may have relied, in imposing the sentence of death. The State raised the specter of petitioner’s future dangerousness generally, but then thwarted all efforts by petitioner to demonstrate that, contrary to the prosecutor’s intimations, he never would be released on parole and thus, in his view, would not pose a future danger to society.5 The logic and effectiveness of petitioner’s argument naturally depended on the fact that he was legally ineligible for parole and thus would remain in prison if afforded a life sentence. Petitioner’s efforts to focus the jury’s attention on the question whether, in prison, he would be a future danger were futile, as he repeatedly was denied any opportunity to inform the jury that he never would be released on parole. The jury was left to speculate about petitioner’s parole eligibility when evaluating petitioner’s future dangerousness, and was denied a straight an*166swer about petitioner’s parole eligibility even when it was requested.
C
The State and its amici contend that petitioner was not entitled to an instruction informing the jury that petitioner is ineligible for parole because such information is inherently misleading.6 Essentially, they argue that because future exigencies such as legislative reform, commutation, clemency, and escape might allow petitioner to be released into society, petitioner was not entitled to inform the jury that he is parole ineligible. Insofar as this argument is targeted at the specific wording of the instruction petitioner requested, the argument is misplaced. Petitioner’s requested instruction (“If... you recommend that [the defendant] be sentenced to life imprisonment, he actually will be sentenced to imprisonment in the state penitentiary for the balance of his natural life,” App. 162) was proposed only after the trial court ruled that South Carolina law prohibited a plain-language instruction that petitioner was ineligible for parole under state law. To the extent that the State opposes even a simple parole-ineligibility instruction because of hypothetical future developments, the argument has little force. Respondent admits that an instruction informing the jury that petitioner is ineligible for parole is legally accurate. Certainly, such an instruction is more accurate than no instruction at all, which leaves the jury to speculate whether “life imprisonment” means life without parole or something else.
The State’s asserted accuracy concerns are further undermined by the fact that a large majority of States which pro*167vide for life imprisonment without parole as an alternative to capital punishment inform the sentencing authority of the defendant’s parole ineligibility.7 The few States that do not provide capital sentencing juries with any information regarding parole ineligibility seem to rely, as South Carolina *168does here, on the proposition that California v. Ramos, 463 U. S. 992 (1983), held that such determinations are purely matters of state law.8
It is true that Ramos stands for the broad proposition that we generally will defer to a State’s determination as to what a jury should and should not be told about sentencing. In a State in which parole is available, how the jury’s knowledge of parole availability will affect the decision whether or not to impose the death penalty is speculative, and we shall not lightly second-guess a decision whether or not to inform a jury of information regarding parole. States reasonably may conclude that truthful information regarding the availability of commutation, pardon, and the like should be kept from the jury in order to provide “greater protection in [the States’] criminal justice system than the Federal Constitution requires.” Id., at 1014. Concomitantly, nothing in the Constitution prohibits the prosecution from arguing any truthful information relating to parole or other forms of early release.
But if the State rests its case for imposing the death penalty at least in part on the premise that the defendant will *169be dangerous in the future, the fact that the alternative sentence to death is life without parole will necessarily undercut the State’s argument regarding the threat the defendant poses to society. Because truthful information of parole ineligibility allows the defendant to “deny or explain” the showing of future dangerousness, due process plainly requires that he be allowed to bring it to the jury’s attention by way of argument by defense counsel or an instruction from the court. See Gardner, 430 U. S., at 362.
Ill
There remains to be considered whether the South Carolina Supreme Court was correct in concluding that the trial court “satisfie[d] in substance [petitioner’s] request for a charge on parole ineligibility,” 310 S. C., at 444, 427 S. E. 2d, at 179, when it responded to the jury’s query by stating that life imprisonment was to be understood in its “plain and ordinary meaning,” ibid. In the court’s view, petitioner basically received the parole-ineligibility instruction he requested. We disagree.
It can hardly be questioned that most juries lack accurate information about the precise meaning of “life imprisonment” as defined by the States. For much of our country’s history, parole was a mainstay of state and federal sentencing regimes, and every term (whether a term of life or a term of years) in practice was understood to be shorter than the stated term. See generally Lowenthal, Mandatory Sentencing Laws: Undermining the Effectiveness of Determinate Sentencing Reform, 81 Calif. L. Rev. 61 (1993) (describing the development of mandatory sentencing laws). Increasingly, legislatures have enacted mandatory sentencing laws with severe penalty provisions, yet the precise contours of these penal laws vary from State to State. See Cheatwood, The Life-Without-Parole Sanction: Its Current Status and a Research Agenda, 34 Crime & Delinq. 43, 45, 48 (1988). Justice Chandler of the South Carolina Supreme *170Court observed that it is impossible to ignore “the reality, known to the ‘reasonable juror/ that, historically, life-term defendants have been eligible for parole.” State v. Smith, 298 S. C. 482, 489-490, 381 S. E. 2d 724, 728 (1989) (opinion concurring and dissenting), cert. denied, 494 U. S. 1060 (1990).9
An instruction directing juries that life imprisonment should be understood in its “plain and ordinary” meaning does nothing to dispel the misunderstanding reasonable jurors may have about the way in which any particular State defines “life imprisonment.”10 See Boyde v. California, 494 U. S. 370, 380 (1990) (where there is a “reasonable likelihood that the jury has applied the challenged instruction in a way that prevents the consideration of constitutionally relevant evidence,” the defendant is denied due process).
It is true, as the State points out, that the trial court admonished the jury that “you are instructed not to consider parole” and that parole “is not a proper issue for your consideration.” App. 146. Far from ensuring that the jury was not misled, however, this instruction actually suggested that parole was available but that the jury, for some unstated reason, should be blind to this fact. Undoubtedly, the instruction was confusing and frustrating to the jury, given *171the arguments by both the prosecution and the defense relating to petitioner’s future dangerousness, and the obvious relevance of petitioner’s parole ineligibility to the jury’s formidable sentencing task. While juries ordinarily are presumed to follow the court’s instructions, see Greer v. Miller, 483 U. S. 756, 766, n. 8 (1987), we have recognized that in some circumstances “the risk that the jury will not, or cannot, follow instructions is so great, and the consequences of failure so vital to the defendant, that the practical and human limitations of the jury system cannot be ignored.” Bruton v. United States, 391 U. S. 123, 135 (1968). See also Beck v. Alabama, 447 U. S. 625, 642 (1980); Barclay v. Florida, 463 U. S., at 950 (“Any sentencing decision calls for the exercise of judgment. It is neither possible nor desirable for a person to whom the State entrusts an important judgment to decide in a vacuum, as if he had no experiences”).
But even if the trial court’s instruction successfully prevented the jury from considering parole, petitioner’s due process rights still were not honored. Because petitioner’s future dangerousness was at issue, he was entitled to inform the jury of his parole ineligibility. An instruction directing the jury not to consider the defendant’s likely conduct in prison would not have satisfied due process in Skipper v. South Carolina, 476 U. S. 1 (1986), and, for the same reasons, the instruction issued by the trial court in this case does not satisfy due process.
IV
The State may not create a false dilemma by advancing generalized arguments regarding the defendant’s future dangerousness while, at the same time, preventing the jury from learning that the defendant never will be released on parole. The judgment of the South Carolina Supreme Court accordingly is reversed, and the case is remanded for further proceedings.
It is so ordered.
with whom Justice Stevens joins, concurring.
I join in Justice Blackmun’s opinion that, at least when future dangerousness is an issue in a capital sentencing determination, the defendant has a due process right to require that his sentencing jury be informed of his ineligibility for parole. I write separately because I believe an additional, related principle also compels today’s decision, regardless of whether future dangerousness is an issue at sentencing.
The Eighth Amendment entitles a defendant to a jury capable of a reasoned moral judgment about whether death, rather than some lesser sentence, ought to be imposed. The Court has explained that the Amendment imposes a heightened standard “for reliability in the determination that death is the appropriate punishment in a specific case,” Woodson v. North Carolina, 428 U. S. 280, 305 (1976) (plurality opinion of Stewart, Powell, and Stevens, JJ.); see also, e. g., Godfrey v. Georgia, 446 U. S. 420, 427-428 (1980); Mills v. Maryland, 486 U. S. 367, 383-384 (1988). Thus, it requires provision of “accurate sentencing information [as] an indispensable prerequisite to a reasoned determination of whether a defendant shall live or die,” Gregg v. Georgia, 428 U. S. 153, 190 (1976) (joint opinion of Stewart, Powell, and Stevens, JJ.), and invalidates “procedural rules that ten[d] to diminish the reliability of the sentencing determination,” Beck v. Alabama, 447 U. S. 625, 638 (1980).
That same need for heightened reliability also mandates recognition of a capital defendant’s right to require instructions on the meaning of the legal terms used to describe the sentences (or sentencing recommendations) a jury is required to consider, in making the reasoned moral choice between sentencing alternatives. Thus, whenever there is a reasonable likelihood that a juror will misunderstand a sentencing term, a defendant may demand instruction on its meaning, and a death sentence following the refusal of such a request *173should be vacated as having been “arbitrarily or discriminatorily” and “wantonly and . . . freakishly imposed.” Furman v. Georgia, 408 U. S. 238, 249 (1972) (Douglas, J., concurring) (internal quotation marks omitted); id., at 310 (Stewart, J., concurring).
While I join the other Members of the Court’s majority in holding that, at least, counsel ought to be permitted to inform the jury of the law that it must apply, see ante, at 169 (plurality opinion); post, at 174 (Ginsburg, J., concurring); post, at 178 (O’Connor, J., concurring in judgment), I also accept the general rule that, on matters of law, arguments of counsel do not effectively substitute for statements by the court.
“[Arguments of counsel generally carry less weight with a jury than do instructions from the court. The former are usually billed in advance to the jury as matters of argument, not evidence, and are likely viewed as the statements of advocates; the latter, we have often recognized, are viewed as definitive and binding statements of the law.” Boyde v. California, 494 U. S. 370, 384 (1990) (citation omitted).
I would thus impose that straightforward duty on the court.
Because Justice Blackmun persuasively demonstrates that juries in general are likely to misunderstand the meaning of the term “life imprisonment” in a given context, see ante, at 159, 169-170, and n. 9, the judge must tell the jury what the term means, when the defendant so requests. It is, moreover, clear that at least one of these particular jurors did not understand the meaning of the term, since the jury sent a note to the judge asking, “Does the imposition of a life sentence carry with it the possibility of parole?” Ante, at 160,170, n. 10. The answer here was easy and controlled by state statute. The judge should have said no. Justice Blackmun shows that the instruction actually given was at *174best a confusing, “equivocal direction to the jury on a basic issue,” Bollenbach v. United States, 326 U. S. 607, 613 (1946), and that “there is a reasonable likelihood that the jury has applied the challenged instruction in a way” that violated petitioner’s rights. Boyde, supra, at 380. By effectively withholding from the jury the life-without-parole alternative, the trial court diminished the reliability of the jury’s decision that death, rather than that alternative, was the appropriate penalty in this case.
While States are, of course, free to provide more protection for the accused than the Constitution requires, see California v. Ramos, 463 U. S. 992, 1014 (1983), they may not provide less. South Carolina did so here. For these reasons, as well as those set forth by Justice Blackmun, whose opinion I join, the judgment of the Supreme Court of South Carolina must be reversed.