with whom Justice Marshall joins and Justice Blackmun joins as to Parts I, II, and III, dissenting.
I
Today the Court vacates a stay of execution entered by the United States District Court for the Eastern District of Missouri and found to be within that court’s discretion by the United States Court of Appeals for the Eighth Circuit, sitting en banc. Contrary to the majority’s intimations, this case does not involve a last minute stay application by a defendant on the eve of his execution. Rather, Winford Stokes raised an equal protection claim in an amendment to a petition for writ of habeas corpus pending in the District Court on April 5, 1990, before the current execution date had been set.* The rush to judgment is instigated here by the *324State’s insistence on vacating the District Court’s grant of a stay to consider Mr. Stokes’ claim.
“In lifting the stay imposed by the Court of Appeals, the Court has resorted to an exercise of power that is unusual and that should only be resorted to on the rare occasion in which a lower court has flagrantly abused its discretion.” Wainwright v. Adams, 466 U. S. 964, 965 (1984). The Court does so on the basis of a rule that quite properly vests considerable discretion in the court most familiar with the facts of the case and its prior history. Title 28 U. S. C. § 2254 Rule 9(b) provides that:
“A second or successive petition may be dismissed if the judge finds that it fails to allege new or different grounds for relief and the prior determination was on the merits or, if new and different grounds are alleged, the judge finds that the failure of the petitioner to assert those grounds in a prior petition constituted an abuse of the writ.” (Emphasis added.)
The judge to whom Mr. Stokes applied for a writ of habeas corpus did not choose to dismiss on such grounds. To the contrary, Judge George F. Gunn found that:
“Upon thorough consideration of the record before it, the Court concludes that the issues raised by petitioner’s claim that his right to equal protection of the laws was violated by the Missouri state courts’ selective application of the rules governing lesser included offense instructions in capital murder cases warrant the imposition of a stay of execution.”
This Court has said repeatedly that the principles governing the disposition of successive writs “are addressed to the sound discretion of the federal trial judges. Theirs is the major responsibility for the just and sound administration of the federal collateral remedies .... We are confident that *325this power will be soundly applied.” Sanders v. United States, 373 U. S. 1, 18-19 (1963). See also Wainwright v. Booker, 473 U. S. 935, 938 (1985) (Marshall, J., dissenting) (“[T]he lower court’s decision is ‘deserving of great weight’ ”). Judge Gunn is particularly well situated to exercise the discretion Congress has entrusted to him. He has heard three of Mr. Stokes’ habeas applications, attending to the complex issues and detailed facts of Mr. Stokes’ conviction over several years.
The Eighth Circuit, also closer to this case than we could hope to be in the few hours we have had to consider the matter, found the District Court’s order sound and responsible. The Court of Appeals similarly is due considerable deference. See Barefoot v. Estelle, 463 U. S. 880, 896 (1983) (“A stay of execution should first be sought from the court of appeals, and this Court generally places considerable weight on the decision reached by the courts of appeals in these circumstances”); O’Connor v. Board of Education of School District 23, 449 U. S. 1301, 1304 (1980) (Stevens, J., in chambers) (“A Court of Appeals’ decision to enter a stay is entitled to great deference”). Nonetheless, this Court has decided that both the District Court and the Court of Appeals have committed such gross abuses of discretion that this Court must intervene. Nothing in the Court’s opinion explains adequately why the lower courts have been adjudged so harshly.
II
The Court vacates the stay granted by the District Court because in this Court’s judgment, Mr. Stokes’ claim “could have been developed long before this last minute application for stay of execution.” Ante, at 321-322. I do not share the Court’s confidence in the matter. While the “equal protection principles asserted” by Mr. Stokes are hardly novel, ibid, (emphasis added) — indeed, they date back to 1868 — the nature of Mr. Stokes’ claim is a different matter.
*326To determine whether the claim is novel, we must begin by defining what it is. The lower courts have not ruled on the merits of Mr. Stokes’ claim. Rather, they in effect have held his case in abeyance pending resolution of Williams v. Armontrout, 891 F. 2d 656 (1989); in this case, the Eighth Circuit, sitting en banc, is reviewing a panel decision that the selective application by Missouri courts of the decision in State v. Baker, 636 S. W. 2d 902, 904-905 (1982) (en banc), cert. denied, 459 U. S. 1183 (1983), “denies similarly situated defendants in capital murder cases equal protection of the law in violation of the fourteenth amendment of the United States Constitution.” 891 F. 2d, at 659. Given that the Eighth Circuit has not determined definitively the contours of the equal protection claim, it is impossible to say at this time whether the claim constitutes a “novel” one.
Even if we could ascertain the precise character of the claim, in order to decide whether it could have been raised in a previous habeas petition we also would have to engage in a comprehensive review of Missouri state cases over the past decade. The Court today does not even purport to do this. In other contexts, the Court has noted that whether a legal claim is a “novel” one depends on an inquiry into existing precedents. Cf. Butler v. McKellar, 494 U. S. 407, 415 (1990) (that claim is “within the ‘logical compass’ of an earlier decision, or indeed that it is ‘controlled’ by a prior decision” does not prevent it from being a “new rule” for purposes of retroactivity). Thus, the mere fact that the Court today can point to an opinion of a dissenting Missouri Supreme Court Justice in 1983 hardly establishes that Mr. Stokes’ claim is not “novel.”
Ill
When a person’s life is at stake we cannot tolerate such facile judgments. I would rather rely on the considered wisdom of the courts below, aided by their familiarity with Missouri law, that Mr. Stokes’ claim cannot be decided until Williams is resolved. Given the dire consequences of error, *327the Court’s rush to judgment is unseemly and indefensible. See Woodard v. Hutchins, 464 U. S. 377, 382-383 (1984) (Brennan, J., dissenting); id., at 384 (Marshall, J., dissenting). There is no call to deny a district court the time it needs to consider properly a petitioner’s claim. “It is . . . important that before we allow human lives to be snuffed out we be sure — emphatically sure — that we act within the law.” Rosenberg v. United States, 346 U. S. 273, 321 (1953) (Douglas, J., dissenting).
IV
Adhering to my view that the death penalty is in all circumstances cruel and unusual punishment prohibited by the Eighth and Fourteenth Amendments, Gregg v. Georgia, 428 U. S. 153, 227 (1976) (Brennan, J., dissenting), I would deny the application to vacate the stay entered by the District Court.
At that time, a stay of execution was in effect pending review by the Eighth Circuit of the District Court’s denial of a previous habeas peti*324tion. This stay was dissolved by the Court of Appeals on April 24. On April 27, the Missouri Supreme Court set Stokes’ execution date for May 11.