Interactive Constitution Essay: Substantive Due Process

. . . The [Supreme] Court has . . . deemed the due process guarantees of the Fifth and Fourteenth Amendments to protect certain substantive rights that are not listed (or “enumerated”) in the Constitution. The idea is that certain liberties are so important that they cannot be infringed without a compelling reason no matter how much process is given.

The Court’s decision to protect unenumerated rights through the Due Process Clause is a little puzzling. The idea of unenumerated rights is not strange—the Ninth Amendment itself suggests that the rights enumerated in the Constitution do not exhaust “others retained by the people.” The most natural textual source for those rights, however, is probably the Privileges and Immunities Clause of the Fourteenth Amendment, which prohibits states from denying any citizen the “privileges and immunities” of citizenship. When The Slaughter-House Cases (1873) foreclosed that interpretation, the Court turned to the Due Process Clause as a source of unenumerated rights.

The “substantive due process” jurisprudence has been among the most controversial areas of Supreme Court adjudication. The concern is that five unelected Justices of the Supreme Court can impose their policy preferences on the nation, given that, by definition, unenumerated rights do not flow directly from the text of the Constitution.

In the early decades of the twentieth century, the Court used the Due Process Clause to strike down economic regulations that sought to better the conditions of workers on the ground that they violated those workers’ “freedom of contract,” even though this freedom is not specifically guaranteed in the Constitution. The 1905 case of Lochner v. New York is a symbol of this “economic substantive due process,” and is now widely reviled as an instance of judicial activism. When the Court repudiated Lochner in 1937, the Justices signaled that they would tread carefully in the area of unenumerated rights. West Coast Hotel Co. v. Parrish (1937).

Substantive due process, however, had a renaissance in the mid-twentieth century. In 1965, the Court struck down state bans on the use of contraception by married couples on the ground that it violated their “right to privacy.” Griswold v. Connecticut. Like the “freedom of contract,” the “right to privacy” is not explicitly guaranteed in the Constitution. However, the Court found that unlike the “freedom of contract,” the “right to privacy” may be inferred from the penumbras—or shadowy edges—of rights that are enumerated, such as the First Amendment’s right to assembly, the Third Amendment’s right to be free from quartering soldiers during peacetime, and the Fourth Amendment’s right to be free from unreasonable searches of the home. The “penumbra” theory allowed the Court to reinvigorate substantive due process jurisprudence.

In the wake of Griswold, the Court expanded substantive due process jurisprudence to protect a panoply of liberties, including the right of interracial couples to marry (1967), the right of unmarried individuals to use contraception (1972), . . . the right to engage in intimate sexual conduct (2003), and the right of same-sex couples to marry (2015). The Court has also declined to extend substantive due process to some rights, such as the right to physician-assisted suicide (1997).

The proper methodology for determining which rights should be protected under substantive due process has been hotly contested. In 1961, Justice Harlan wrote an influential dissent in Poe v. Ullman, maintaining that the project of discerning such rights “has not been reduced to any formula,” but must be left to case-by-case adjudication. In 1997, the Court suggested an alternative methodology that was more restrictive: such rights would need to be “carefully descri[bed]” and, under that description, “deeply rooted in the Nation’s history and traditions” and “implicit in the concept of ordered liberty.” Washington v. Glucksberg (1997). . . .