Justice Rehnquist argued that the plurality lacked a sound constitutional basis for treating evolving standards of decency as sufficient to invalidate mandatory death sentencing. Even accepting that framework, he believed the historical movement toward discretionary sentencing reflected concern that guilty defendants were escaping punishment through jury nullification, not a societal conclusion that mandatory execution was cruel and unusual.
He further maintained that the post-Furman enactment of mandatory capital statutes showed that several legislatures preferred mandatory death sentences to abolition. The plurality, he argued, discounted those legislative choices simply because it disapproved of them.
Justice Rehnquist saw no coherent distinction between the discretion that could arise through jury nullification under North Carolina's mandatory law and the discretion expressly permitted by the Georgia, Florida, and Texas systems upheld the same day. He doubted that appellate proportionality review could meaningfully correct discretion exercised in favor of life, and he viewed the plurality's requirement of guided standards as inconsistent with McGautha v. California.
Finally, he rejected the newly announced requirement of individualized capital sentencing. Death's finality might justify careful procedures to ensure a fair trial and accurate factfinding, but it did not, in his view, establish a constitutional right to consideration of every mitigating aspect of an offender's character and circumstances. Because the petitioners were validly convicted of first-degree murder and death was concededly a permissible punishment for that crime, he would have affirmed.