Justice BRENNAN delivered the opinion of the Court.
[An Oklahoma law] prohibits the sale of "nonintoxicating" 3.2% beer to males under the age of 21 and to females under the age of 18. The question to be decided is whether such a gender-based differential constitutes a denial to males 18-20 years of age of the equal protection of the laws in violation of the Fourteenth Amendment. . . .
Analysis may appropriately begin with the reminder that [Reed v. Reed, 404 U.S. 71 (1971)] emphasized that statutory classifications that distinguish between males and females are "subject to scrutiny under the Equal Protection Clause." To withstand constitutional challenge, previous cases establish that classifications by gender must serve important governmental objectives and must be substantially related to achievement of those objectives. . . .
. . . We turn then to the question whether, under Reed, the difference between males and females with respect to the purchase of 3.2% beer warrants the differential in age drawn by the Oklahoma statute. We conclude that it does not. . .
We accept for purposes of discussion the District Court's identification of the objective underlying [the law] as the enhancement of traffic safety. Clearly, the protection of public health and safety represents an important function of state and local governments. However, appellees' statistics in our view cannot support the conclusion that the gender-based distinction closely serves to achieve that objective and therefore the distinction cannot under Reed withstand equal protection challenge.
The appellees introduced a variety of statistical surveys. First, an analysis of arrest statistics for 1973 demonstrated that 18-20-year-old male arrests for "driving under the influence" and "drunkenness" substantially exceeded female arrests for that same age period. Similarly, youths aged 17-21 were found to be overrepresented among those killed or injured in traffic accidents, with males again numerically exceeding females in this regard. Third, a random roadside survey in Oklahoma City revealed that young males were more inclined to drive and drink beer than were their female counterparts. Fourth, Federal Bureau of Investigation nationwide statistics exhibited a notable increase in arrests for "driving under the influence." Finally, statistical evidence gathered in other jurisdictions, particularly Minnesota and Michigan, was offered to corroborate Oklahoma's experience by indicating the pervasiveness of youthful participation in motor vehicle accidents following the imbibing of alcohol. . . .
Even were this statistical evidence accepted as accurate, it nevertheless offers only a weak answer to the equal protection question presented here. The most focused and relevant of the statistical surveys, arrests of 18-20-year-olds for alcohol-related driving offenses, exemplifies the ultimate unpersuasiveness of this evidentiary record. Viewed in terms of the correlation between sex and the actual activity that Oklahoma seeks to regulate driving while under the influence of alcohol the statistics broadly establish that .18% of females and 2% of males in that age group were arrested for that offense. While such a disparity is not trivial in a statistical sense, it hardly can form the basis for employment of a gender line as a classifying device. Certainly if maleness is to serve as a proxy for drinking and driving, a correlation of 2% must be considered an unduly tenuous "fit." Indeed, prior cases have consistently rejected the use of sex as a decisionmaking factor even though the statutes in question certainly rested on far more predictive empirical relationships than this. . . .
There is no reason to belabor this line of analysis. It is unrealistic to expect either members of the judiciary or state officials to be well versed in the rigors of experimental or statistical technique. But this merely illustrates that proving broad sociological propositions by statistics is a dubious business, and one that inevitably is in tension with the normative philosophy that underlies the Equal Protection Clause. Suffice to say that the showing offered by the appellees does not satisfy us that sex represents a legitimate, accurate proxy for the regulation of drinking and driving. In fact, when it is further recognized that Oklahoma's statute prohibits only the selling of 3.2% beer to young males and not their drinking the beverage once acquired (even after purchase by their 18-20-year-old female companions), the relationship between gender and traffic safety becomes far too tenuous to satisfy Reed's requirement that the gender-based difference be substantially related to achievement of the statutory objective.
We hold, therefore, that under Reed, Oklahoma's 3.2% beer statute invidiously discriminates against males 18-20 years of age. . . .
Justice STEVENS, concurring.
There is only one Equal Protection Clause. It requires every State to govern impartially. It does not direct the courts to apply one standard of review in some cases and a different standard in other cases. Whatever criticism may be leveled at a judicial opinion implying that there are at least three such standards applies with the same force to a double standard.
I am inclined to believe that what has become known as the two-tiered analysis of equal protection claims does not describe a completely logical method of deciding cases, but rather is a method the Court has employed to explain decisions that actually apply a single standard in a reasonably consistent fashion. I also suspect that a careful explanation of the reasons motivating particular decisions may contribute more to an identification of that standard than an attempt to articulate it in all-encompassing terms. It may therefore be appropriate for me to state the principal reasons which persuaded me to join the Court's opinion.
In this case, the classification is not as obnoxious as some the Court has condemned, nor as inoffensive as some the Court has accepted. It is objectionable because it is based on an accident of birth, because it is a mere remnant of the now almost universally rejected tradition of discriminating against males in this age bracket, and because, to the extent it reflects any physical difference between males and females, it is actually perverse. The question then is whether the traffic safety justification put forward by the State is sufficient to make an otherwise offensive classification acceptable.
The classification is not totally irrational. For the evidence does indicate that there are more males than females in this age bracket who drive and also more who drink. Nevertheless, there are several reasons why I regard the justification as unacceptable. It is difficult to believe that the statute was actually intended to cope with the problem of traffic safety, since it has only a minimal effect on access to a not very intoxicating beverage and does not prohibit its consumption. Moreover, the empirical data submitted by the State accentuate the unfairness of treating all 18-20-year-old males as inferior to their female counterparts. The legislation imposes a restraint on 100% of the males in the class allegedly because about 2% of them have probably violated one or more laws relating to the consumption of alcoholic beverages. It is unlikely that this law will have a significant deterrent effect either on that 2% or on the law-abiding 98%. But even assuming some such slight benefit, it does not seem to me that an insult to all of the young men of the State can be justified by visiting the sins of the 2% on the 98%.
Justice REHNQUIST, dissenting.
The Court's disposition of this case is objectionable on two grounds. First is its conclusion that men challenging a gender-based statute which treats them less favorably than women may invoke a more stringent standard of judicial review than pertains to most other types of classifications. Second is the Court's enunciation of this standard, without citation to any source, as being that "classifications by gender must serve important governmental objectives and must be substantially related to achievement of those objectives." The only redeeming feature of the Court's opinion, to my mind, is that it apparently signals a retreat by those who joined the plurality opinion in Frontiero v. Richardson, 411 U.S. 677 (1973), from their view that sex is a "suspect" classification for purposes of equal protection analysis. I think the Oklahoma statute challenged here need pass only the "rational basis" equal protection analysis expounded in cases such as . . . Williamson v. Lee Optical Co., 348 U.S. 483 (1955), and I believe that it is constitutional under that analysis.
In Frontiero v. Richardson, the opinion for the plurality sets forth the reasons of four Justices for concluding that sex should be regarded as a suspect classification for purposes of equal protection analysis. These reasons center on our Nation's "long and unfortunate history of sex discrimination," 411 U.S., at 684, which has been reflected in a whole range of restrictions on the legal rights of women, not the least of which have concerned the ownership of property and participation in the electoral process. Noting that the pervasive and persistent nature of the discrimination experienced by women is in part the result of their ready identifiability, the plurality rested its invocation of strict scrutiny largely upon the fact that "statutory distinctions between the sexes often have the effect of invidiously relegating the entire class of females to inferior legal status without regard to the actual capabilities of its individual members."
Subsequent to Frontiero, the Court has declined to hold that sex is a suspect class, and no such holding is imported by the Court's resolution of this case. However, the Court's application here of an elevated or "intermediate" level scrutiny, like that invoked in cases dealing with discrimination against females, raises the question of why the statute here should be treated any differently from countless legislative classifications unrelated to sex which have been upheld under a minimum rationality standard.
Most obviously unavailable to support any kind of special scrutiny in this case, is a history or pattern of past discrimination, such as was relied on by the plurality in Frontiero to support its invocation of strict scrutiny. There is no suggestion in the Court's opinion that males in this age group are in any way peculiarly disadvantaged, subject to systematic discriminatory treatment, or otherwise in need of special solicitude from the courts.
The Court does not discuss the nature of the right involved, and there is no reason to believe that it sees the purchase of 3.2% beer as implicating any important interest, let alone one that is "fundamental" in the constitutional sense of invoking strict scrutiny. Indeed, the Court's accurate observation that the statute affects the selling but not the drinking of 3.2% beer, ante, at 204, further emphasizes the limited effect that it has on even those persons in the age group involved. There is, in sum, nothing about the statutory classification involved here to suggest that it affects an interest, or works against a group, which can claim under the Equal Protection Clause that it is entitled to special judicial protection. . . .