The answer in four moves
1. The Constitution is higher law
Judicial review starts from the idea that the Constitution is not just advice. It is the superior rule that organizes and limits government.
2. Courts have to interpret law in real cases
When two legal rules conflict, judges cannot avoid interpretation. They must decide which rule governs the case before them.
3. Marbury made the principle canonical
In 1803, the Supreme Court in Marbury v. Madison confirmed that the federal judiciary could declare legislative acts unconstitutional.
4. Review is a constitutional check, not rule by judges
Judicial review does not mean courts write the Constitution. It means they treat it as binding when ordinary politics collides with fundamental law.
Marshall in his own words
“It is emphatically the province and duty of the Judicial Department to say what the law is.”
Chief Justice John Marshall's most famous sentence in Marbury v. Madison captures why judicial review follows from the everyday judicial task of deciding cases.
“the Constitution controls any legislative act repugnant to it”
The National Constitution Center's Marbury materials preserve Marshall's clear statement that an ordinary statute cannot outrank the Constitution.
“No legislative act therefore contrary to the constitution can be valid.”
Hamilton says nearly the same thing in Federalist 78, which is why Marbury feels less like a bolt from nowhere and more like a constitutional principle made explicit.
What does judicial review actually mean?
Judicial review means that when a legal dispute reaches court, judges do not treat every statute or executive action as automatically valid simply because a political branch issued it. If the Constitution and the challenged act cannot both stand, the Constitution must govern.
That is why judicial review is closely tied to the logic of a written constitution. If written limits can be ignored whenever an ordinary law says otherwise, those limits are not really higher law at all. They become suggestions to the very institutions they were meant to restrain.
How does Federalist 78 fit into the story?
Federalist 78 is one of the strongest founding-era arguments for judicial review. Hamilton says the courts should act as an intermediate body between the people and the legislature, preferring the Constitution to a statute when the two conflict.
That does not mean Hamilton uses the later phrase “judicial review” in the modern textbook sense. But it does mean he gives a crisp argument for constitutional supremacy, judicial independence, and the duty to treat unconstitutional legislation as invalid.
How did Marbury v. Madison establish judicial review?
The dispute
William Marbury wanted the Supreme Court to order the new administration to deliver his judicial commission after the transition from Adams to Jefferson.
The turning point
Chief Justice Marshall concluded that the part of the Judiciary Act of 1789 giving the Court that remedy in original jurisdiction conflicted with the Constitution.
The consequence
Because the statute conflicted with the Constitution, the Court treated that statutory grant as unconstitutional. Marbury lost the remedy, but judicial review won a permanent place in constitutional law.
The important point is not just the case drama. It is the reasoning: the people can establish fundamental law, the Constitution is that law, and courts deciding cases must treat it as superior to ordinary legislation. That is the logic the Library of Congress and Constitution Center both emphasize in their Marbury materials.
What judicial review does not mean
- It does not mean judges are above the Constitution; it means they are bound to apply it.
- It does not mean courts initiate all constitutional questions on their own; judicial review occurs through actual cases and controversies.
- It does not mean the judiciary is the only institution that thinks about constitutionality; it means courts have a distinct role when constitutional conflicts reach them.
This is why judicial review belongs in the same reading path as Federalist 51 and Federalist vs Anti-Federalist. The whole constitutional design question is about how power is divided, limited, and made answerable to higher principles.
Why judicial review still matters
Judicial review still matters because written constitutions still face the same problem Hamilton and Marshall saw. What happens when the institutions created by the Constitution want to push beyond the limits the Constitution imposes? If there is no practical mechanism for preferring fundamental law to ordinary political acts, constitutional limits become aspirational rather than binding.
That does not answer every modern controversy about the courts. But it explains why judicial review remains central to American constitutional government: it is one of the core ways a written constitution tries to stay superior to ordinary legislation and executive convenience.
What to read next
Primary sources and further reading
- Marbury v. Madison: Primary Documents in American History | Library of Congress — concise explanation of the 1803 case that established judicial review in U.S. constitutional law.
- Marbury v. Madison | National Constitution Center — useful plain-language summary of the case plus excerpts from Marshall's reasoning on constitutional supremacy and the duty of the judiciary.
- The Federalist No. 78 — Hamilton's founding-era defense of judicial independence and the idea that unconstitutional laws cannot be valid.
Read judicial review as the practical side of constitutional supremacy
If judicial review makes sense to you, keep going. Read Federalist 78, compare it with Federalist 51, and use the rest of Publius to see how a written constitution tries to remain higher law inside ordinary political conflict.