Lochner v. New York — The Substantive Due Process Era and Economic Liberty

Lochner v. New York, 198 U.S. 45 (1905), is the most infamous case in American constitutional history — not for the rights it upheld, but for the constitutional methodology it represents and the era it defined. New York had enacted a maximum-hours law for bakery workers: no employee could be required to work more than ten hours per day or sixty hours per week in a bakery. Joseph Lochner, a bakery owner, was convicted for requiring an employee to work more than sixty hours in a week and challenged the law as an unconstitutional interference with his and the employee's "liberty of contract" — the purported right to negotiate and enforce employment contracts free from government regulation. The Supreme Court agreed, 5–4: the Fourteenth Amendment's Due Process Clause protects a general "liberty of contract," and New York's maximum-hours law interfered with that liberty without sufficient justification. Lochner inaugurated an era — lasting roughly from 1897 to 1937 — in which the Supreme Court used substantive due process to strike down state and federal economic regulations: minimum wage laws, child labor regulations, price controls, and labor organizing restrictions were all subjected to heightened judicial scrutiny and often invalidated. The "Lochner Era" ended with the constitutional crisis of 1937 (West Coast Hotel Co. v. Parrish) when the Court, facing President Roosevelt's court-packing threat after his landslide re-election, abruptly reversed course and abandoned economic due process. Lochner has not been formally overruled, but it has been discredited — treated as an exemplar of judicial overreach in which unelected judges substituted their own economic philosophy for democratic legislative choice. Understanding Lochner is essential to understanding modern constitutional law: it explains why the Court applies only rational basis review to economic legislation, why substantive due process claims require a "deeply rooted" historical tradition, and why the specter of "Lochnerizing" — inventing constitutional rights without textual foundation — haunts every expansion of substantive due process doctrine.

Current Law (2026)

Legal Authority

• U.S. Const. amend. XIV, § 1 — "nor shall any State deprive any person of life, liberty, or property, without due process of law" — the Due Process Clause that Lochner interpreted to include a substantive right to freedom of contract
• Allgeyer v. Louisiana, 165 U.S. 578 (1897) — The first case clearly recognizing "liberty of contract" as a substantive due process right; held that Louisiana could not apply its insurance regulation to prevent a Louisiana citizen from contracting with a New York insurer
• Lochner v. New York, 198 U.S. 45 (1905) — New York's maximum-hours law for bakery workers violates the Fourteenth Amendment; liberty of contract cannot be restricted absent a valid police power justification; bakers are not a "special class" requiring protection
• Muller v. Oregon, 208 U.S. 412 (1908) — Maximum-hours law for women upheld because women's physical differences and their role as mothers provide a police power justification; illustrated that Lochner doctrine was applied in a discriminatory way that upheld protections for women while striking them for men
• Adkins v. Children's Hospital, 261 U.S. 525 (1923) — Minimum wage law for women and children in D.C. struck down; freedom of contract is "the rule" and restriction is "the exception"; Justice Holmes and Chief Justice Taft dissent
• West Coast Hotel Co. v. Parrish, 300 U.S. 379 (1937) — Overruled Adkins; upheld Washington State's minimum wage law for women; "reasonable" economic regulations satisfy due process; the "switch in time that saved nine" ending the Lochner Era
• United States v. Carolene Products Co., 304 U.S. 144 (1938) — Upheld federal regulation of "filled milk"; announced that economic regulations receive rational basis review; famous Footnote Four suggested that heightened scrutiny applies to legislation affecting discrete and insular minorities or constitutional rights — but not economic regulation
• Williamson v. Lee Optical of Oklahoma, 348 U.S. 483 (1955) — Paradigmatic post-Lochner rational basis review: state optician licensing law with no real justification upheld; "the day is gone when this Court uses the Due Process Clause … to strike down state laws … because they may be unwise, improvident, or out of harmony with a particular school of thought"

Key Mechanics

Lochner v. New York (1905) struck down a New York labor law that limited bakery workers to 10 hours per day and 60 hours per week as an unconstitutional infringement on "liberty of contract" — a right the Court read into the Fourteenth Amendment's Due Process Clause. Justice Peckham's majority held that the bakers' right to contract for their own labor could only be overridden by a valid police power justification (protection of health, safety, or morals), and that a maximum-hours law for adult male bakers — who the Court said did not need special protection — failed that standard. Justice Holmes's famous dissent argued that "the Fourteenth Amendment does not enact Mr. Herbert Spencer's Social Statics" — constitutional interpretation should not be a vehicle for the Court's economic philosophy. The Lochner Era (roughly 1905–1937) produced a string of decisions striking down minimum wage laws, maximum-hours laws, price regulations, and other economic regulations on substantive due process grounds. It ended with the "switch in time that saved nine" — West Coast Hotel v. Parrish (1937), decided as FDR threatened to pack the Court, upheld a minimum wage law and explicitly rejected the Lochner framework. Post-Lochner, economic regulations receive only rational basis review — essentially guaranteed upholding. The term "Lochnerizing" is used as criticism when courts are accused of substituting their own economic preferences for democratic choices. In modern substantive due process (Griswold, Lawrence, Obergefell), the Court has been careful to distinguish its protection of non-economic fundamental rights from Lochner's protection of economic liberty.

How It Works

Facts: A Bakery Worker's Hours and Constitutional Law

The case arose from New York's Bakeshop Act of 1895, which limited bakery employees to no more than ten hours per day and sixty hours per week. New York enacted the law in response to organized labor's campaigns and reform advocates' concerns about exploitative conditions in underground bakeries — poorly ventilated, hot, dust-filled environments where workers labored long hours with little recourse. Joseph Lochner owned Heimler's Bakery in Utica; he was convicted and fined for requiring an employee named Aman Schmitter to work 103 hours in one two-week period. Lochner appealed on constitutional grounds.

The question before the Supreme Court was whether New York could constitutionally limit the hours of bakery workers. Lochner argued the law interfered with his right — and Schmitter's right — to contract freely about the terms of employment. New York argued the law was a valid exercise of its police power to protect the health of workers and the public.

The Majority Opinion: Liberty of Contract as Constitutional Right

Justice Peckham's majority held 5–4 that the bakeshop law violated the Fourteenth Amendment. The due process "liberty" protected by the Amendment, Peckham reasoned, includes the right to purchase and sell labor — the freedom to contract about the terms and conditions of one's own employment. This liberty can be restricted by the state's police power, but only when the restriction "has a real or substantial relation to the protection of the public health or welfare."

The Court found the connection too attenuated. Bakers were not a special class of workers requiring protective legislation — they were "able to assert their rights and care for themselves without the protecting arm of the State." The maximum-hours law was not actually aimed at protecting health; it was instead an unwarranted interference in private economic arrangements, essentially legislation drafted at the behest of unions to limit work hours for all employees rather than to address genuine safety concerns. In Peckham's famous formulation, the law was "an illegal interference with the rights of individuals, both employers and employees, to make contracts regarding labor upon such terms as they may think best, or which they may agree upon with the other parties to such contracts."

The Dissents: Holmes and Harlan

Justice Holmes's famous dissent is one of the most quoted passages in American constitutional law:

"This case is decided upon an economic theory which a large part of the country does not entertain. … The Fourteenth Amendment does not enact Mr. Herbert Spencer's Social Statics. … A constitution is not intended to embody a particular economic theory, whether of paternalism and the organic relation of the citizen to the State or of laissez faire. It is made for people of fundamentally differing views, and the accident of our finding certain opinions natural and familiar or novel and even shocking ought not to conclude our judgment upon the question whether statutes embodying them conflict with the Constitution."

Holmes argued that the Constitution does not enshrine any particular economic philosophy — not laissez-faire economics and not paternalism. The question for the courts is simply whether the reasonable legislature could believe the law had a rational basis. If rational people disagree about an economic or social policy, the judiciary should stay its hand. The legislature — democratically accountable — should make the choice.

Justice Harlan's separate dissent was more technical: he argued that New York's legislative findings about bakers' health justified the law on public health grounds. The baking occupation was genuinely hazardous, involving flour dust and long hours in hot, poorly ventilated spaces. The legislature's reasonable conclusion that limiting hours would protect workers' health deserved judicial deference.

The Lochner Era: Three Decades of Economic Due Process

Lochner defined a constitutional era. Between 1897 and 1937, the Supreme Court used substantive due process (and related doctrines under the Commerce Clause) to strike down:

• Minimum wage laws (Adkins v. Children's Hospital, 1923)
• Laws restricting "yellow dog" contracts requiring employees to not join unions (Coppage v. Kansas, 1915)
• Laws requiring payment of wages in cash rather than company scrip
• Price regulations for particular industries
• Entry restrictions on certain trades and professions

The doctrine was applied inconsistently — maximum-hours laws for women were upheld (Muller v. Oregon, 1908) on the paternalistic ground that women needed protection, while similar laws for men were struck down. The result was that the Constitution protected male workers' "freedom" to contract away their own well-being while denying women that freedom in a discriminatory application of the same doctrine.

Labor and reform advocates developed a constitutional critique: "freedom of contract" was a legal fiction when one party (the employer) had vastly more bargaining power than the other (the worker). Substantive due process was not protecting any real freedom — it was using constitutional law to entrench inequality of bargaining power as if it were constitutionally mandated.

The Constitutional Crisis of 1937 and the End of the Lochner Era

The Lochner Era ended in the constitutional confrontation of 1937. President Roosevelt, frustrated that the Supreme Court was striking down New Deal legislation (the NIRA, AAA, and other programs), proposed his "court-packing plan" — adding one justice for every sitting justice over 70, up to six new justices, which would have given Roosevelt a pro-New-Deal majority. The plan failed in Congress.

But before Congress could act, Justice Owen Roberts — who had previously voted to strike down economic regulation — changed his position and voted to uphold Washington State's minimum wage law in West Coast Hotel Co. v. Parrish (1937), reversing Adkins and signaling the Court's retreat from economic due process. The "switch in time that saved nine" ended the Lochner Era.

United States v. Carolene Products Co. (1938) announced the new framework: economic legislation receives only rational basis review. Any "reasonably conceivable state of facts" justifying the legislation is sufficient. Courts do not second-guess the wisdom or efficacy of economic regulations. Justice Stone's famous Footnote Four suggested a different rule for legislation affecting fundamental rights or targeting discrete and insular minorities — but not for ordinary economic regulation.

Williamson v. Lee Optical (1955) completed the repudiation: Oklahoma law requiring a doctor's or optometrist's prescription before opticians could fit eyeglasses was upheld despite its obvious protection of the optometry profession at the expense of both opticians and consumers. "The day is gone when this Court uses the Due Process Clause of the Fourteenth Amendment to strike down state laws, regulatory of business and industrial conditions, because they may be unwise, improvident, or out of harmony with a particular school of thought."

Lochner's Legacy: The Ghost That Haunts Constitutional Law

Lochner was not formally overruled — the Court never explicitly said "Lochner v. New York was wrong." It has simply been buried under contradictory doctrine. But its ghost haunts every case involving substantive due process. Critics of expanding constitutional rights under substantive due process routinely accuse the Court of "Lochnerizing" — inventing unenumerated rights that are not rooted in constitutional text or historical tradition. This accusation has been aimed from the right at Roe v. Wade (reproductive rights) and from the left at Citizens United (corporate speech rights).

Washington v. Glucksberg (1997) — in which the Court refused to recognize a constitutional right to assisted suicide — reflected Chief Justice Rehnquist's effort to cabin substantive due process through a strict "deeply rooted in history and tradition" test. The concern behind Glucksberg was explicitly anti-Lochner: substantive due process should not be a blank check for judges to impose their own policy preferences under the guise of constitutional rights.

Dobbs v. Jackson Women's Health Organization (2022) revived the Lochner debate. Justice Alito's majority opinion overruling Roe relied heavily on the tradition-based Glucksberg test, explicitly invoking Lochner as the cautionary example of unmoored substantive due process. Justice Thomas's concurrence called for reconsidering other substantive due process precedents — Griswold, Lawrence, Obergefell — using the same logic. The dissenters argued that Dobbs itself risked the kind of selective constitutional protection that Lochner exemplified.

How It Affects You

If you are a state or local legislator: Lochner's defeat means you have very broad authority to regulate economic conditions — hours, wages, working conditions, occupational licensing, price regulation, consumer protection, and business practices — without serious constitutional risk. The rational basis standard requires only that you can articulate a rational reason for the regulation; courts will not second-guess its wisdom or effectiveness. The major limits on economic regulation today are the Commerce Clause (requiring some connection to commerce), the Takings Clause (requiring just compensation for property taken), and First Amendment concerns if you are regulating economic speech. The ghost of Lochner is what cleared the path for the modern administrative-regulatory state.

If you are an economic libertarian or property rights advocate: The Lochner Era represents the last time the Constitution was interpreted to provide meaningful protection for economic liberty against government regulation. Modern conservative and libertarian legal scholars debate whether Lochner was correctly decided — some argue it was right on the merits (freedom of contract is a real constitutional value) but wrong in its execution (courts applied it inconsistently and without clear limiting principles). Others argue that the original meaning of the Fourteenth Amendment's Due Process Clause supports some protection for economic liberty. Lochner remains cited in challenges to occupational licensing requirements, professional regulations, and land use controls — but with little judicial success under current rational basis doctrine.

If you are a labor or employment lawyer: Lochner's defeat created the constitutional space for the entire modern system of labor regulation. Every protection that federal and state law provide to workers — minimum wage, maximum hours, safe workplace requirements, family and medical leave, anti-discrimination law, workers' compensation — exists because Lochner was repudiated. Before 1937, the Constitution was interpreted to protect employers' rights to contract terms that workers had no real power to resist. The modern administrative state's ability to regulate the employment relationship traces directly to the constitutional revolution of 1937.

If you are a constitutional law scholar or litigant relying on substantive due process: The Lochner accusation is your principal adversary. Any claim to a new constitutional right under substantive due process will be met with the charge that you are asking the Court to replicate Lochner's overreach. To overcome this charge, your strongest argument is that the right is deeply rooted in the nation's history and tradition (Glucksberg's test), not merely consistent with evolving social values. Dobbs's re-centering of this debate on Glucksberg's tradition test — and the dissenters' warning that Obergefell and Griswold might be next — makes the Lochner question live again in ways that seemed settled for decades.

State Variations

Lochner addressed Fourteenth Amendment limits on state power, and its defeat cleared the field for state economic regulation. States retain broad police power authority to regulate economic conditions, and the federal rational basis floor means that almost any state economic regulation survives constitutional challenge:

State constitutions and economic liberty: Some state constitutions contain provisions that have been interpreted to provide stronger protection for economic liberty than the post-Lochner federal minimum. Several state supreme courts — notably in California and other states — have applied their own state due process guarantees with slightly greater rigor to economic regulations, particularly in occupational licensing contexts.

Occupational licensing: The most significant modern context in which Lochner-era concerns resonate is occupational licensing. States license hundreds of occupations — from hair braiders to interior designers — with entry restrictions that protect existing practitioners. Challenges to these restrictions under substantive due process or equal protection rarely succeed under federal doctrine, but some states have enacted occupational licensing reform statutes and a few state courts have applied more rigorous scrutiny to licensing requirements with no health or safety rationale.

Labor regulation: Post-Lochner, states have broad authority to regulate labor conditions, wages, and hours. Most states have enacted minimum wages above the federal floor, overtime requirements, and workplace safety regulations. The constitutional floor is low, but many states provide higher statutory protections.

Pending Legislation

No federal legislation pending directly modifies the constitutional framework established by Lochner's repudiation — that framework is embedded in the Court's substantive due process doctrine. However:

• Occupational licensing reform: Federal proposals to require states to demonstrate health or safety rationale for occupational licensing requirements (as a condition of federal grants) implicitly address Lochner-era concerns about protective licensing; such proposals have had bipartisan support from economists and libertarian and progressive reformers alike.
• Minimum wage and labor standards: Federal minimum wage legislation and proposals to expand federal labor protections operate entirely within the post-Lochner constitutional framework; there is no serious constitutional challenge to federal minimum wage or maximum-hours laws after 1937.

Recent Developments

• 2022 — Dobbs v. Jackson Women's Health Organization: Overruled Roe v. Wade using the Glucksberg tradition-based test; Justice Thomas's concurrence explicitly called for reconsidering Griswold, Lawrence, and Obergefell on the ground that they are no more grounded in history and tradition than Lochner; the majority opinion distinguished these cases but the debate about the scope of substantive due process is live again.
• 2022 onward — Post-Dobbs state legislation: Several states enacted near-total abortion bans and other significant social legislation; challenges to these laws necessarily navigate the terrain of substantive due process doctrine that Lochner and its repudiation defined.
• 2023–2026 — Occupational licensing and Lochner's ghost: Courts continue to apply rational basis review to occupational licensing requirements, rejecting Lochner-style substantive due process challenges; but federal and state licensing reform debates invoke the same concerns about regulatory capture and entry barriers that animated the Lochner Era challenges.
• 2024–2026 — Academic debate: Federalist Society and originalist scholars continue to debate whether Lochner was correctly decided as a matter of original meaning; some argue that the Privileges or Immunities Clause, not the Due Process Clause, was the proper home for economic liberty protection, and that Lochner was wrong in method but right in result; others argue it was wrong in both respects. This academic debate has limited current judicial impact but shapes the long-term development of substantive due process doctrine.