Law
The Constitutional Protection of Economic Liberties and Substantive Due Process
Quick fact
In the 1905 case Lochner v. New York, the Supreme Court used substantive due process to invalidate a state maximum-hours law for bakers, treating freedom of contract as a protected liberty—a decision later repudiated but still symbolically powerful today.
Why this is interesting
Imagine if a law setting a maximum 60-hour workweek was struck down as unconstitutional. That actually happened for decades. How could the Constitution protect the freedom to work longer hours?
Read the full explanation
Understanding The Constitutional Protection of Economic Liberties and Substantive Due Process
The Due Process Clause of the Fourteenth Amendment says no state shall deprive any person of life, liberty, or property without due process of law. The Supreme Court has interpreted this to have both a procedural and a substantive component. Procedural due process focuses on the fairness of government processes, like giving notice and a hearing. Substantive due process, however, asks whether the law itself is fair—whether it infringes on fundamental rights or liberties, regardless of how it is enforced. For economic liberties, the key is whether a law unreasonably interferes with a person's freedom to engage in business, make contracts, or pursue their livelihood. The Supreme Court has fluctuated on how much protection to give these liberties. In the late 19th and early 20th centuries, the Court used substantive due process to strike down many economic regulations, such as wage and hour laws, on the grounds that they violated the implied constitutional right to freedom of contract. This period is known as the Lochner era, after the famous case. However, during the New Deal, the Court faced intense political pressure and eventually reversed course, adopting a more deferential approach to economic regulation. Today, economic regulations are subject to a 'rational basis' test, meaning they are upheld as long as they are rationally related to a legitimate government interest. This allows states broad latitude to regulate business, protect workers, and promote the public welfare. Meanwhile, substantive due process has been redirected to protect more personal and fundamental rights, such as privacy and marriage, where stricter scrutiny applies.
A deeper explanation
Substantive due process is a judge-made doctrine that infuses the Due Process Clause with a substantive guarantee: that certain liberties are so fundamental that no process, no matter how fair, can justify government infringement. The mechanism works by having courts identify these fundamental liberties and then apply varying levels of judicial scrutiny based on their importance. For economic liberties, the recognition of 'freedom of contract' as a fundamental liberty in the Lochner era led to a strict review, striking down laws that interfered with private bargaining. The doctrinal shift began with cases like Nebbia v. New York (1934) and West Coast Hotel Co. v. Parrish (1937), which upheld state regulations fixing prices and minimum wages, explicitly rejecting the idea that contract rights are absolute. This 'switch in time' is widely understood as a response to President Roosevelt's court-packing threat and the economic crisis of the Great Depression. Since then, the Supreme Court has applied a minimal scrutiny standard—the rational basis test—to economic legislation. Under this test, courts presume the law is constitutional and uphold it if there is any conceivable rational relationship to a legitimate government interest, such as public health, safety, or welfare. This nearly toothless review gives legislatures wide discretion to regulate the economy. In contrast, substantive due process has taken on a new life in the realm of personal rights, such as contraception, abortion, and same-sex marriage, where the Court applies strict scrutiny, requiring the government to show a compelling interest and narrowly tailored means. This dichotomy between economic liberties and fundamental personal liberties is a defining feature of modern constitutional law—economic liberties are often left to the political process, while personal liberties are protected by the judiciary. Understanding this mechanism reveals the Court's role in balancing individual freedom against government power, and how that balance has evolved dramatically over time.