Substantive Due Process

Substantive due process is the constitutional doctrine holding that the Due Process Clauses of the Fifth and Fourteenth Amendments protect certain fundamental rights from government infringement, regardless of the fairness of the procedures employed. Unlike procedural due process, which asks whether the government followed fair procedures, substantive due process asks whether the government has an adequate justification for depriving a person of life, liberty, or property.

The doctrine protects rights that are deeply rooted in the nation's history and traditions or implicit in the concept of ordered liberty. The Supreme Court has recognized a range of fundamental rights under substantive due process, including the right to marry (Loving v. Virginia), the right to contraception (Griswold v. Connecticut), the right to direct the upbringing of children (Pierce v. Society of Sisters), the right to bodily autonomy, and the right to intimate sexual conduct (Lawrence v. Texas). When a fundamental right is at stake, courts apply strict scrutiny, requiring the government to demonstrate that its action is narrowly tailored to serve a compelling interest.

When no fundamental right is implicated, substantive due process challenges are evaluated under rational basis review. The challenged law need only be rationally related to a legitimate governmental interest. This deferential standard means that economic and social regulations almost always survive substantive due process challenges, a lesson driven home by the Court's repudiation of the Lochner v. New York approach to economic liberty.

Substantive due process remains controversial. Critics argue that it allows judges to read unenumerated rights into the Constitution without textual support, functioning as a license for judicial activism. Defenders contend it is essential to protecting individual liberty from majoritarian overreach and that the concept of "liberty" in the Due Process Clause has always encompassed substantive protections. The doctrine's scope continues to evolve with each generation's understanding of fundamental rights.

Key Elements

1A fundamental right deeply rooted in history and tradition is at stake
2The government has burdened or infringed that right
3Strict scrutiny applies: the law must be narrowly tailored to a compelling interest
4Non-fundamental rights receive rational basis review
5The analysis focuses on the substance of the government's justification, not procedural fairness

Why Law Students Need to Know This

Substantive due process is central to constitutional law exams dealing with fundamental rights. Students must identify whether a fundamental right is at stake and apply the correct level of scrutiny.