concurring in the judgment.
I concur in the Court’s judgment and with much of its opinion. As the Court notes, ante, at 102, we have already recognized that Halper’s statements of standards for identifying what is criminally punitive under the Fifth Amendment needed revision, United States v. Ursery, 518 U. S. 267, 284-285, n. 2 (1996), and there is obvious sense in employing common criteria to point up the criminal nature of a statute for purposes of both the Fifth and Sixth Amendments. See United States v. One Assortment of 89 Firearms, 465 U. S. 354, 362-366 (1984); United States v. Ward, 448 U. S. 242, 248-249 (1980); Kennedy v. Mendoza-Martinez, 372 U. S. 144, 168-169 (1963); see also Ward, supra, at 254 (“[I]t would be quite anomalous to hold that [the statute] created a criminal penalty for the purposes of the Self-Incrimination Clause but a civil penalty for all other purposes”).
Applying the Court’s Kennedy-Ward criteria leads me directly to the conclusion of Justice Stevens’s opinion eon-*113earring in the judgment. The fifth criterion calls for a court to determine whether “the behavior to which [the penalty] applies is already a crime.” Kennedy v. Mendoza-Martinez, supra, at 168-169. The efficient starting point for identifying constitutionally relevant “behavior,” when considering an objection to a successive prosecution, is simply to apply the same-elements test as originally stated in Blockburger v. United States, 284 U. S. 299 (1932). See United States v. Dixon, 509 U. S. 688 (1993). When application of Block-burger under Kennedy-Ward shows that a successive prosecution is permissible even on the assumption that each penalty is criminal, the issue is necessarily settled. Such is the ease here, as Justice Stevens explains. See ante, at 107 (opinion concurring in judgment). Applying the Kennedy-Ward criteria, therefore, I would stop just where Justice Stevens stops.
My acceptance of the Kennedy-Ward analytical scheme is subject to caveats, however. As the Court points out, under Ward, once it is understood that a legislature intended a penalty to be treated as civil in character, that penalty may be held criminal for Fifth Amendment purposes (and, for like reasons, under the Sixth Amendment) only on the “clearest proof” of its essentially criminal proportions. While there are good and historically grounded reasons for using that phrase to impose a substantial burden on anyone claiming that an apparently civil penalty is in truth criminal, what may be clear enough to be “clearest” is necessarily dependent on context, as indicated by the cases relied on as authority for adopting the standard in Ward. Flemming v. Nestor, 363 U. S. 603 (1960), used the quoted language to describe the burden of persuasion necessary to demonstrate a criminal and punitive purpose unsupported by “objective manifestations” of legislative intent. Id., at 617. Rex Trailer Co. v. United States, 350 U. S. 148, 154 (1956), cited as secondary authority, required a defendant to show that a “measure of recovery” was “unreasonable or excessive” before “what was *114clearly intended as a civil remedy [would be treated as] a criminal penalty.” One Lot Emerald Cut Stones v. United States, 409 U. S. 232, 237 (1972) (per curiam), cited Rex Trailer for that standard and relied on the case as exemplifying a provision for liquidated damages as distinct from criminal penalty. I read the requisite “clearest proof” of criminal character, then, to be a function of the strength of the countervailing indications of civil nature (including the presumption of constitutionality enjoyed by an ostensibly civil statute making no provision for the safeguards guaranteed to criminal defendants. See Flemming, supra, at 617).
I add the further caution, to be wary of reading est proof” requirement as a guarantee that such a demonstration is likely to be as rare in the future as it has been in the past. See United States v. Halper, 490 U. S. 435, 449 (1989) (“What we announce now is a rule for the rare case”). We have noted elsewhere the expanding use of ostensibly civil forfeitures and penalties under the exigencies of the current drug problems, see Ursery, supra, at 300 (Stevens, J., concurring in judgment in part and dissenting in part) (“In recent years, both Congress and the state legislatures have armed their law enforcement authorities with new powers to forfeit property that vastly exceed their traditional tools”); United States v. James Daniel Good Real Property, 510 U. S. 43, 81-82 (1993) (Thomas, J., concurring in part and dissenting in part), a development doubtless spurred by the increasingly inviting prospect of its profit to the Government. See id., at 56, n. 2 (opinion of the Court) (describing the Government's financial stake in drug forfeiture); see also id., at 56 (citing Harmelin v. Michigan, 501 U. S. 957, 979, n. 9 (1991) (opinion of Scalia, J.) for the proposition that “it makes sense to scrutinize governmental action more closely when the State stands to benefit”). Hence, on the infrequency of “clearest proof,” history may not be repetitive.