Louis Brandeis (1856–1941) was an American lawyer, reformer, and Supreme Court Justice whose work on privacy, free speech, antitrust, and federalism still shapes American law today. He spent his pre-Court years as a crusading public-interest attorney in Boston, served twenty-three years on the Supreme Court after a bitter 1916 confirmation fight, and became the first Jewish Justice in the Court’s history. Many of his dissents eventually became the law of the land.
The People’s Attorney
Brandeis graduated from Harvard Law School with the highest grade point average in the school’s history and built a thriving private practice in Boston. He kept drifting toward public interest work, often refusing fees in cases he believed served the common good. Between roughly 1905 and 1913 he waged a public campaign against the New Haven Railroad, a monopoly that controlled rail and steamship transportation across New England. The fight gave him the nickname that stuck for the rest of his life: “The People’s Attorney.”1U.S. Capitol – Visitor Center. Senate Resolution to Advise and Consent to the Appointment of Louis D. Brandeis
His reform work ran well beyond the courtroom. He championed savings bank life insurance, a system that let working-class families buy affordable policies directly from mutual savings banks rather than paying the inflated premiums charged by industrial insurers. His advocacy produced the Massachusetts Savings Bank Life Insurance Act of 1907.2Louis D. Brandeis School of Law Library. Chapter 12 – Successes of Savings Bank Life Insurance
Inventing the Right to Privacy
In 1890, Brandeis and his law partner Samuel Warren published “The Right to Privacy” in the Harvard Law Review. The article essentially created a new legal concept. It responded to the rise of intrusive journalism and snapshot photography, which for the first time let newspapers publish images of private citizens without consent. Brandeis and Warren argued that the common law should protect a person’s private life from public exposure just as it protected physical property, and they framed this as a “right to be let alone.”3Harvard Law Review. The Right to Privacy
The piece laid the groundwork for modern privacy law, including claims for unauthorized use of a person’s name or likeness. Nearly eighty years later, the Supreme Court cited the article by name in Katz v. United States (1967), the ruling that extended Fourth Amendment protections to electronic surveillance.4Justia. Katz v. United States, 389 U.S. 347 (1967)
The Brandeis Brief
Brandeis changed how lawyers argue cases in 1908. Defending an Oregon law that limited female laundry workers to ten-hour days in Muller v. Oregon, he submitted a document that devoted only two pages to traditional legal argument and filled more than a hundred pages with data from factory inspectors, physicians, economists, and social workers documenting the health consequences of long working hours.5Justia. Muller v. Oregon, 208 U.S. 412 (1908)
The Supreme Court upheld the Oregon law and explicitly acknowledged the brief’s “very copious collection” of sociological evidence. The approach proved that real-world data about how a law affects people could carry as much weight as abstract legal reasoning. It became a model for later constitutional litigation, most famously in Brown v. Board of Education (1954), where lawyers used psychological research to show the harm segregated schooling inflicted on Black children.
The Curse of Bigness
Brandeis was not simply opposed to large corporations as a matter of taste. He developed a coherent theory that concentrated economic power was both inefficient and dangerous to democracy. He coined the phrase “the curse of bigness” to describe companies that dominated markets through sheer scale rather than better products or management. In his view, the trusts were not winning because they were better run; they were winning because they could crush competitors.
He laid out the argument in his 1914 book “Other People’s Money and How the Bankers Use It,” drawing on the congressional Pujo Committee investigation and his own battles against J.P. Morgan and the New Haven Railroad. The book’s central claim was that large banking houses colluded with industrialists to create trusts that stifled competition and grew too bloated to operate efficiently.6Louis D. Brandeis School of Law Library. Other People’s Money
His thinking shaped the antitrust legislation of 1914. President Woodrow Wilson relied heavily on his advice, and the result was the Federal Trade Commission Act and the Clayton Antitrust Act, which gave the federal government real tools to intervene against unfair competition and block anticompetitive mergers before they closed. Those laws remain the backbone of American antitrust enforcement. The “neo-Brandeisian” movement that influenced federal enforcement actions against major technology companies in the early 2020s took its name and much of its argument from him.
Confirmation and a Historic Appointment
In January 1916, President Wilson nominated Brandeis to the Supreme Court. The confirmation fight that followed was unlike anything the Senate had seen. Corporate interests resented his anti-monopoly crusades, parts of the legal establishment questioned his unconventional methods, and antisemitism ran through much of the criticism. The Senate Judiciary Committee held public hearings on a Supreme Court nominee for the first time in history. After months of testimony and debate, the Senate confirmed him on June 1, 1916, by a vote of 47 to 22.1U.S. Capitol – Visitor Center. Senate Resolution to Advise and Consent to the Appointment of Louis D. Brandeis
Brandeis became the first Jewish Justice in Supreme Court history.7Justia. Justice Louis Brandeis
Key Opinions on the Court
Brandeis served twenty-three years before retiring in 1939. His most enduring contributions often came in dissent, where he staked out positions the Court would adopt decades later. He also wrote majority opinions that reshaped entire areas of law.
Free Speech in Whitney v. California
In Whitney v. California (1927), involving California’s criminal syndicalism law, Brandeis wrote a concurrence joined by Justice Oliver Wendell Holmes that is widely considered the most powerful defense of free speech in American legal history. He wrote that the founders “believed that freedom to think as you will and to speak as you think are means indispensable to the discovery and spread of political truth,” and that “the greatest menace to freedom is an inert people.” His central insight was that the remedy for dangerous speech is more speech: “If there be time to expose through discussion the falsehood and fallacies, to avert the evil by the processes of education, the remedy to be applied is more speech, not enforced silence.”8Justia. Whitney v. California, 274 U.S. 357 (1927)
The opinion raised the bar for when government may restrict speech, insisting that suppression is justified only when the danger is both imminent and serious. That standard became foundational to modern First Amendment law.
Privacy in the Olmstead Dissent
In Olmstead v. United States (1928), the majority held that wiretapping telephone conversations did not violate the Fourth Amendment because the government had never physically entered anyone’s home. Brandeis dissented. He argued that the founders wrote the Fourth Amendment to protect “the sanctities of a man’s home and the privacies of life” against whatever form of government intrusion might arise, including forms the founders could never have imagined. He called the right to be let alone “the most comprehensive of rights and the right most valued by civilized men.”9Legal Information Institute. Olmstead v. United States
The Court rejected his view in 1928. Nearly forty years later, Katz v. United States (1967) effectively adopted it, holding that “the Fourth Amendment protects people, not places” and declaring that Olmstead’s reasoning “can no longer be regarded as controlling.”4Justia. Katz v. United States, 389 U.S. 347 (1967)
Erie Railroad and the End of Federal Common Law
Near the end of his tenure Brandeis wrote one of the most consequential majority opinions of the twentieth century. In Erie Railroad Co. v. Tompkins (1938), he overturned nearly a century of precedent by holding that “there is no federal general common law.” Under the prior rule from Swift v. Tyson (1842), federal courts in diversity cases had been free to apply their own version of the common law, which often differed from what state courts would have ruled. Brandeis wrote that this practice had “rendered impossible equal protection of the law” and invaded rights reserved to the states by the Constitution. The decision forced federal courts to apply state substantive law in diversity cases, a rule that remains a cornerstone of civil procedure.10Justia. Erie Railroad Co. v. Tompkins, 304 U.S. 64 (1938)
The Ashwander Rules
In Ashwander v. Tennessee Valley Authority (1936), Brandeis authored a concurrence that outlined seven principles, now known as the Ashwander Rules, for when the Court should avoid ruling on constitutional questions. They counsel against deciding constitutional issues in non-adversarial proceedings, before they are necessary, or more broadly than the facts require, and favor disposing of cases on non-constitutional grounds whenever possible.11Justia. Ashwander v. Tennessee Valley Authority, 297 U.S. 288 (1936) They are regularly cited in federal litigation as guiding principles of constitutional avoidance.
Laboratories of Democracy
Dissenting in New State Ice Co. v. Liebmann (1932), Brandeis wrote the sentence that would define his thinking on federalism: “It is one of the happy incidents of the federal system that a single courageous State may, if its citizens choose, serve as a laboratory; and try novel social and economic experiments without risk to the rest of the country.”12Justia. New State Ice Co. v. Liebmann, 285 U.S. 262 (1932) The “laboratories of democracy” phrase has been invoked countless times to justify state autonomy in areas from healthcare to marijuana regulation to environmental policy.
Why Brandeis Still Matters
Brandeis retired from the Supreme Court in 1939 and died on October 5, 1941, at the age of eighty-four. His legacy is unusual in that it grew after his death. The privacy right he imagined in 1890 became the basis for later rulings on contraception, abortion, and digital surveillance. His Whitney concurrence set the standard for First Amendment law. His “laboratories of democracy” metaphor is invoked so routinely that most people who use it have no idea where it came from. His warnings about concentrated corporate power have taken on fresh urgency in an era of technology companies whose reach dwarfs anything the trusts of his day could have imagined.