The 1803 case that gave courts the power to strike down unconstitutional laws.
This is the story of a delivery that never happened — and it ended up shaping every court case you have ever heard of. In 1801, outgoing President John Adams lost the election to Thomas Jefferson. In his last days in office, Adams appointed a batch of judges — his opponents called them the “midnight judges” — and signed their commissions. One commission, for a man named William Marbury to be a justice of the peace in Washington, D.C., was signed and sealed but never delivered.
When Jefferson took office, his Secretary of State, James Madison, simply refused to deliver Marbury's commission. Marbury sued. He went straight to the Supreme Court and asked it to order Madison to hand over the job — using a power Congress had given the Court in a law called the Judiciary Act of 1789.
Chief Justice John Marshall, writing the decision in 1803, pulled off one of the cleverest moves in American history. He ruled that Marbury was right — he deserved the commission. But then Marshall said the Court could not help him, because the part of the Judiciary Act that let Marbury come straight to the Supreme Court was itself unconstitutional. Congress had tried to give the Supreme Court more power than the Constitution allowed.
Here is why that matters more than Marbury's job: in striking down that law, Marshall established the principle of judicial review — the idea that courts can declare laws unconstitutional and refuse to enforce them. His logic was straightforward: the Constitution is the supreme law of the land, and if a regular law conflicts with the Constitution, the Constitution wins. Somebody has to make that call, and Marshall said that somebody is the courts.
Think about what that means for you. Every time a court throws out a law for violating free speech, or gun rights, or due process — that power traces back to this case. Without judicial review, the Bill of Rights would be suggestions, not guarantees, because no one could enforce them against the government.
Not everyone loves it. Critics point out that the Constitution never actually says “the Supreme Court gets the final word” — Marshall read that power into it. That means unelected judges can overrule laws passed by elected lawmakers, which some people see as undemocratic. Supporters answer that this is exactly the point: the whole reason we have a Constitution is to put some rights beyond the reach of temporary majorities. Both sides have a case. But whatever you think of it, judicial review is the load-bearing wall of the American legal system, and it has stood since 1803.