Equal Protection Clause
The Equal Protection Clause is a part of the Fourteenth Amendment to the United States Constitution, providing that "no state shall make or enforce any law which shall... deny to any person within its jurisdiction the equal protection of the laws." The story of the Equal Protection Clause is the story of the America's continuing attempt to determine what its stated commitment to egalitarianism should mean in practice.
The background to the Equal Protection Clause

The Fourteenth Amendment was enacted in 1868, shortly after the American Civil War. Though the Thirteenth Amendment, proposed by Congress and ratified by the states in 1865, had abolished slavery, many ex-Confederate states adopted Black Codes immediately following the war. These laws severely restricted the power of African-Americans to hold property, form and enforce contracts, and created harsher criminal penalities for blacks than for whites.
In response to the Black Codes, Congress enacted the Civil Rights Act of 1866, which provided that all those born in the United States were citizens of the United States (this provision was meant to overturn the Supreme Court’s decision in Dred Scott v. Sandford), and required that "citizens of every race and color... [have] full and equal benefit of all laws and proceedings for the security of person and property, as is enjoyed by white citizens."
Doubts about whether Congress could legitimately enact such a law under the then-existing Constitution led Congress to begin to draft and debate what would become the Equal Protection Clause of the Fourteenth Amendment.
The Southern states, of course, were opposed to the Act, but in 1865 Congress, exercising its power under Article I, section 5, clause 1 of the Constitution, to "be the Judge of the… Qualifications of its own Members," had excluded Southerners from Congress, declaring that their states, having seceded from the Union, could therefore not elect members to Congress. It was this fact—the fact that the Fourteenth Amendment was enacted by a "rump" Congress—that allowed the Equal Protection Clause, which white Southerners almost uniformly hated, to be passed by Congress and proposed to the states. Its ratification by the former Confederate states was made a condition of their reacceptance into the Union.
By its terms, the Clause restrains only state governments. However, the Fifth Amendment's due process guarantee, beginning with Bolling v. Sharpe (1954), has been interpreted as imposing the same restrictions on the federal government.
Postwar interpretation of the Equal Protection Clause
The first truly landmark Equal Protection decision by the Supreme Court was Strauder v. West Virginia (1880). A black man convicted of murder by an all-white jury challenged a West Virginia statute excluding blacks from serving on juries. The Court asserted that the purpose of the Clause was
- to assure to the colored race the enjoyment of all the civil rights that under the law are enjoyed by white persons, and to give to that race the protection of the general government, in that enjoyment, whenever it should be denied by the States.
Exclusion of blacks from juries, the Court concluded, was a denial of equal protection to black defendants, since the jury had been "drawn from a panel from which the State has expressly excluded every man of [the defendant's] race."
The next important postwar case was the Civil Rights Cases (1883), where at issue was the constitutionality of Civil Rights Act of 1875, which provided that all persons should have "full and equal enjoyment of... inns, public conveyances on land or water, theatres, and other places of public amusement." In its opinion, the Court laid down what has since become known as the "State Action Doctrine," which limits the guarantees of the Equal Protection Clause only to acts done or otherwise "sanctioned in some way" by the state. Prohibiting blacks from attending plays or staying in inns was "simply a private wrong," provided, of course, that the state's law saw it as a wrong. Justice Harlan dissented alone, saying,
- I cannot resist the conclusion that the substance and spirit of the recent amendments of the Constitution have been sacrificed by a subtle and ingenious verbal criticism.
Harlan went on to argue that because (1) "public conveyances on land and water" use the public highways, and (2) innkeepers engage in what is "a quasi-public employment," and (3) "places of public amusement" are licensed under the laws of the states, excluding blacks from using these services was an act sanctioned by the state.
In the most notorious of these cases, Plessy v. Ferguson (1896), the Court upheld a Louisiana law requiring the segregation of blacks and whites on railroads, including separate railway cars.

The Court, speaking through Justice Henry Brown, said that the Equal Protection Clause had been intended to defend equality in civil rights, not equality in social arrangements. All that was therefore required of the law was reasonableness, and it amply met that requirement, being based on "the established usages, customs and traditions of the people."
Justice Harlan again dissented, famously. "Every one knows," he wrote,
- that the statute in question had its origin in the purpose, not so much to exclude white persons from railroad cars occupied by blacks, as to exclude colored people from coaches occupied by or assigned to white persons.... [I]n view of the Constitution, in the eye of the law, there is in this country no superior, dominant, ruling class of citizens. There is no caste here. Our Constitution is color-blind, and neither knows nor tolerates classes among citizens.
Such "arbitrary separation" by race, Harlan concluded, was "a badge of servitude wholly inconsistent with the civil freedom and the equality before the law established by the Constitution."
Since Brown v. Board of Education of Topeka, Kansas (1954), Justice Harlan's dissent in Plessy has been vindicated as a matter of legal doctrine, and the Clause has been interpreted as imposing a general restraint on the government's power to discriminate against people based on certain classes, including race and sex (see below).
The beginnings of modern interpretation of the Clause
Thus the Plessy majority's intepretation of the Clause stood until Brown. However, the holding of Brown was prefigured, to some extent, by several cases decided in the late 1930s, the 1940s, and the early 1950s.
The first of these was Missouri ex rel. Gaines v. Canada (1938), in which a black student at Missouri's all-black college sought admission to the law school at the all-white University of Missouri—there being no law school at the all-black college. Admission was denied him, and the Supreme Court, applying the separate-but-equal principle of Plessy, held that a State's offering a legal education to whites but not to blacks violated the Equal Protection Clause.
Smith v. Allwright (1944) and Shelley v. Kraemer (1948), though not dealing with education, indicated the Court's increased willingness to find racial discrimination illegal. Smith declared that the Democratic primary in Texas, in which voting was restricted to whites alone, was unconstitutional, partly on equal protection grounds. Shelley concerned a privately made contract that prohibited "people of the Negro or Mongolian race" from living on a particular piece of land. Seeming to go against the spirit, if not the exact letter, of the The Civil Rights Cases, the Court found that, although a discriminatory private contract could not violate the Equal Protection Clause, the courts' enforcement of such a contract could: after all, the Supreme Court reasoned, courts were part of the state.
More important, however, were the companion cases Sweatt v. Painter and McLaurin v. Oklahoma State Regents, both decided in 1950. In McLaurin, the University of Oklahoma had admitted McLaurin, an African-American, but had restricted his activities there: he had to sit apart from the rest of the students in the classrooms and library, and could eat in the cafeteria only at a designated table. A unanimous Court, through Chief Justice Vinson, said that Oklahoma had deprived McLaurin of the equal protection of the laws:
- There is a vast difference—a Constitutional difference—between restrictions imposed by the state which prohibit the intellectual commingling of students, and the refusal of individuals to commingle where the state presents no such bar.
The present situation, Vinson said, was the former.
In Sweatt, the Court considered the constitutionality of Texas's state system of law schools, which educated blacks and whites at separate institutions. The Court (again through Chief Justice Vinson, and again with no dissenters) invalidated the school system—not because it separated students, but rather because the separate facilities were not equal. They lacked "substantial equality in the educational opportunities" offered to their students.
All of these cases, it should be noted (including Brown), were litigated by the National Association for the Advancement of Colored People. It was Charles Hamilton Houston, a Harvard Law School graduate and a law professor at Howard University, who first began to challenge racial discrimination in the federal courts beginning in the 1930s. Thurgood Marshall, a former student of Houston's and the future Solicitor General and Associate Justice of the Supreme Court, joined him. Both men were extraordinarily skilled appellate advocates, but part of their shrewdness lay in their careful choice of which cases to litigate—of which situations would be the best legal proving grounds for their cause.
Brown and its consequences
When Earl Warren became Chief Justice in (1953), Brown had already come before the Court. While Vinson was still Chief Justice, there had been a preliminary vote on the case at a conference of all nine justices. Then, the Court had split, with a majority of the justices voting that school segregation did not violate the Equal Protection Clause. Warren, however, through persuasion and good-natured cajoling—he had been an extremely successful Republican politician before joining the Court—was able to convince all nine justices to join his opinion declaring school segregation unconstitutional. Warren wrote:
- To seperate [children in grade and high schools] from others of similar age and qualifications solely because of their race generates a feeling of inferiority as to their status in the community that may affect their hearts and minds in a way unlikely ever to be undone.... We conclude that in the field of public education the doctrine of "separate but equal" has no place. Separate educational facilities are inherently unequal.
The Court then set the case for reargument on the question of what the solution would be. In Brown II, decided the next year, it was concluded that since the problems identified in the previous opinion were local, the solutions needed to be so as well. Thus the court devolved authority to local school boards and to the trial courts that had originally heard the cases. (Brown had actually been comprised of four different cases from four different states.) The trial courts and localities were told to desegregate with "all deliberate speed."

Partly because that enigmatic phrase, but mostly because of self-declared "massive resistance" in the South to the desegregation decision, integration did not begin until the mid-1960s, and then only to a small degree. In fact, much of the integration in the 1960s happened in response not to Brown but to the Civil Rights Act of 1964. The Supreme Court intervened a handful of times in the late 1950s and early 1960s, but its next major desegregation decision was Green v. New Kent County School Board (1968), in which Justice Brennan, writing for a unanimous Court, rejected a "freedom-of-choice" school plan as inadequate. This was a significant act; freedom-of-choice plans had been very common responses to Brown. Under these plans, parents could choose to send their children to either a formerly white or a formerly black school. Whites almost never opted to attend black-identified schools, however, and blacks, from fear of violence or harassment, rarely attended white-identified schools.
In response to Green, many Southern districts replaced freedom-of-choice with geographically-based schooling systems; but because residential segregation was widespread, this had little effect, either. In 1971, the Court in Swann v. Charlotte-Mecklenburg Board of Education approved busing as a remedy to segregation; three years later, though, the case of Milliken v. Bradley (1974), it set aside a lower court order that had required the busing of students between districts, instead of merely within a district. Milliken basically ended the Supreme Court's major involvement in school desegregation; however, up through the 1990s many federal trial courts remained involved in school desegregation cases, many of which had begun in the '50s and '60s. American public school systems, especially in large metropolitan areas, to a large extent are still de facto segregated. Whether due to Brown, to Congressional action, or to societal change, the percentage of black students attending school districts a majority of whose students were black decreased somewhat until the early 1980s, at which point that percentage began to increase. By the late 1990s, the percentage of black students in mostly-minority school districts had returned to about what it was in the late 1960s.
There are, very broadly speaking, two ways to explain America's marked lack of success in school integration in the five decades since Brown. One way, sometimes voiced by political conservatives, argues that Brown's relative failure is due to the inherent limitations of law and the courts, which simply do not have the institutional competence to supervise the desegregation of whole school districts. Moreover, the federal government's, and especially the Supreme Court's, hubris actually provoked the resistance of locals, since education in the United States is traditionally a matter for local control. The other way to explain what has happened since Brown often has political liberals as its proponents; it argues that the Court's decree in Brown II was insufficiently rigorous to force segregated localities into action, and that real success began only after the other two branches of the federal government got involved—the Executive Branch (under Kennedy and Johnson) by encouraging the Department of Justice to pursue judicial remedies against resistant school districts, and Congress by passing the Civil Rights Acts of 1964 and 1968. Liberals also point out that Richard Nixon's "southern strategy" was premised on a tacit support of segregation that continued when Nixon came to office, so that after 1968 the Executive was no longer behind the Court's constitutional commitments.
Carolene Products and the various levels of Equal Protection scrutiny
Despite the undoubted importance of Brown, much of modern equal protection jurisprudence stems from the fourth footnote in United States v. Carolene Products Co., a commerce clause and substantive due process case decided by the Supreme Court in 1938. In 1937, the Court (in what was called the "switch in time that saved nine") had loosened its rules for deciding whether certain activities affected interstate commerce or were unprotected by the Due Process Clause, and hence could be regulated by Congress. In discussing the new presumption of constitutionality that the Court would apply to economic legislation, Justice Harlan Stone wrote:
- ...[P]rejudice against discrete and insular minorities may be a special condition, which tends seriously to curtail the operation of those political processes ordinarily to be relied upon to protect minorities, and which may call for a correspondingly more searching judicial inquiry.
Thus were born the "more searching" levels of scrutiny—"strict" and "intermediate"—with which the Court would examine legislation directed at racial minorities and women. It should be noted, however, that the Court did not apply strict scrutiny, by that name, until the 1967 case of Loving v. Virginia, and that intermediate scrutiny did not come into being until the 1976 case of Craig v. Boren.
The Supreme Court has defined these levels of scrutiny in the following ways: To determine whether a law violates the equal protection clause, the following analysis is done:
Strict scrutiny (if the law categorizes on the basis of race): the law is unconstitutional unless it is the "least restrictive means" of serving a "compelling" government interest.
Intermediate scrutiny (if the law categorizes on the basis of sex): the law is unconstitutional unless it is "substantially related" to an "important" government interest. Note that in past decisions "sex" generally has meant gender.
Rational-basis test (if the law categorizes on some other basis): the law is constitutional so long as it is "reasonably related" to a "legitimate" government interest.
Discriminatory intent or disparate impact?
Another controversial area of equal protection theory—although it seems that the legal doctrine has been settled by the Supreme Court—is the issue of whether an equal protection violation requires purposeful discrimination, or whether it merely requires what is termed "disparate impact." In other words, does Equal Protection outlaw public policies that cause racial disparities (for example, a public school examination that more white students than black students pass) or does it merely outlaw intentional bigotry by public officials?
The Supreme Court has answered: It depends. In the context of Title VII of the Civil Rights Act of 1964, which forbids job discrimination on the basis of race, national origin, sex or religion, the Supreme Court has answered (in Griggs v. Duke Power Co. (1971)) that (1) if an employer's policy has disparate racial consequences, and (2) if the employer can't give a reasonable justification for such a policy on grounds of "business necessity," then the employer's policy violates Title VII. In the years since Griggs, courts have defined "business necessity" as requiring the employer to prove that whatever is causing the racial disparity—be it a test, an educational requirement, a hiring practice—has a demonstrable factual relationship to making the company more profitable.
In most other situations, however, the Court's focus is on discriminatory intent. This was made clear in the seminal case of Arlington Heights v. Metropolitan Housing Corp. (1977). In that case, the plaintiff, a housing developer, sued a Chicago suburb that had refused to rezone a plot of land in order to allow low-income, racially integrated housing to be built. There was no clear evidence of racially discriminatory intent on the part of Arlington Heights's planning commission, in their refusal to grant a rezoning; the result, however, was racially disparate, since the refusal prevented more African-Americans and Hispanics than whites from moving in. Justice Powell, writing for the Court, stated, "Proof of racially discriminatory intent or purpose is required to show a violation of the Equal Protection Clause." Disparate impact merely has an evidentiary value; absent a "stark" pattern, said the Court, "impact is not determinative." (See also Washington v. Davis (1976).)
Defenders of the Court's approach in Arlington Heights and Washington v. Davis argue that the Equal Protection Clause was not intended to guarantee equal outcomes, but rather equal opportunities; and that, therefore, we shouldn't be concerned with trying to fix every racially disparate effect—we should worry only about intentional bigotry. Critics of the approach, however, contend that focusing on intent and according only an evidentiary value to disparate racial impact misses the point. Racial bigotry, they say, is, especially nowadays, unconscious; giving much more weight to disparate impact can remedy the kind of unconscious racism that a requirement of conscious discriminatory intent cannot. This debate, though, goes on almost entirely in the academy, since the Supreme Court has not changed its basic approach as outlined in Arlington Heights.
Who is a "suspect class"?
The Supreme Court has seemed unwilling to extend "suspect class" status (i.e., status deserving of greater judicial protection by means of higher levels of scrutiny) to groups other than women and racial minorities. In City of Cleburne v. Cleburne Living Center, Inc. (1985), the Court refused to make the mentally retarded a suspect class. Many commentators have noted, however—and Justice Marshall so notes in his partial concurrence—that the Court does appear to examine the City of Cleburne's denial of a permit to a group home to the retarded with a significantly higher degree of scrutiny than is typically associated with the rational-basis test.
So far the Court has not extended suspect-class status to gays or lesbians. Much as in City of Cleburne, though, the Court's decision in Romer v. Evans (1996), striking down a Colorado constitutional amendment aimed at denying homosexuals "minority status, quota preferences, protected status or [a] claim of discrimination," seemed to employ a markedly higher level of scrutiny than the nominally applied rational-basis test. It seems probable, therefore, that the Court, whatever it may decide about the substantive constitutionality of laws that prohibit same-sex unions, will not explicitly apply heightened scrutiny to them; however, this question is unresolved. Some legal academics have argued that "sex" should be interpreted to include sexual orientation, in which case intermediate scrutiny could apply to gay rights cases.
See also
- Brest, Levison, Balkin & Amar, Processes of Constitutional Decisionmaking.
- Ely, Democracy and Distrust.
- Kluger, Simple Justice.
- Orfield, "Schools More Separate," Harvard University Civil Rights Project (July, 2001).
- Powe, The Warren Court and American Politics.
- Rosenberg, The Hollow Hope: Can Courts Bring About Social Change?.
- Vann Woodward, The Strange Career of Jim Crow.