Cite as: 536 U. S. 304 (2002)
Scalia, J., dissenting
imposes upon all trials, but rather by the sentencer's weighing of the circumstances (both degree of retardation and depravity of crime) in the particular case. The fact that juries continue to sentence mentally retarded offenders to death for extreme crimes shows that society's moral outrage sometimes demands execution of retarded offenders. By what principle of law, science, or logic can the Court pronounce that this is wrong? There is none. Once the Court admits (as it does) that mental retardation does not render the offender morally blameless, ante, at 318, there is no basis for saying that the death penalty is never appropriate retribution, no matter how heinous the crime. As long as a mentally retarded offender knows "the difference between right and wrong," ibid., only the sentencer can assess whether his retardation reduces his culpability enough to exempt him from the death penalty for the particular murder in question.
As for the other social purpose of the death penalty that the Court discusses, deterrence: That is not advanced, the Court tells us, because the mentally retarded are "less likely" than their nonretarded counterparts to "process the information of the possibility of execution as a penalty and . . . control their conduct based upon that information." Ante, at 320. Of course this leads to the same conclusion discussed earlier—that the mentally retarded (because they are less deterred) are more likely to kill—which neither I nor the society at large believes. In any event, even the Court does not say that all mentally retarded individuals cannot "process the information of the possibility of execution as a penalty and . . . control their conduct based upon that information"; it merely asserts that they are "less likely" to be able to do so. But surely the deterrent effect of a penalty is adequately vindicated if it successfully deters many, but not all, of the target class. Virginia's death penalty, for example, does not fail of its deterrent effect simply because some criminals are unaware that Virginia has the death penalty. In other words, the supposed fact that some
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