Glossary on the Republic

Prior restraint

Press

Punishing a story after it runs is one thing. Stopping it from ever running is the gravest threat to a free press there is, and the government almost never gets to do it.

Prior restraint is government action that blocks speech or publication before it happens, as opposed to punishing it afterward. It is censorship in its purest form: not you will answer for that, but you may not say that at all.

American courts treat it as the most serious of all First Amendment violations, presumptively unconstitutional. The reason is simple. A story punished after publication has at least been heard. A story stopped in advance simply vanishes, and the public never learns what it was forbidden to know.

The defining test came in 1971. The Nixon administration went to court to stop newspapers from publishing the Pentagon Papers, a secret government history of the Vietnam War, claiming national security. The Supreme Court refused, ruling the government had not met the heavy burden that prior restraint demands.

That burden is enormous by design. The government must show that publication would cause direct, immediate, and irreparable harm to the nation. Mere embarrassment, or even general security concerns, are not enough. Almost nothing clears the bar.

Origin

Government action that blocks publication in advance; presumptively unconstitutional under the First Amendment.

Why it matters

The rule against prior restraint is the difference between a government that can respond to a story and one that can prevent you from ever telling it. It is why, in the United States, the default is that the presses run, and the government has to argue, afterward and against the steepest odds, that they should not have.