Thornhill v. Alabama
The Court struck down an Alabama law that made it a crime to loiter near or picket a business to discourage people from dealing with it, ruling that the law violated free speech and freedom of the press.
Because the statute swept in virtually every peaceful way of publicizing a labor dispute, the Court held it could not stand even though the state claimed it was only trying to prevent violence and disorder.
How it got here: Alabama's trial court and Court of Appeals upheld Thornhill's conviction and the state's highest court denied review; the Supreme Court granted certiorari because of the importance of the free-speech questions.
The Case in Depth
What happened
A union at an Alabama wood-preserving plant went on strike, and Byron Thornhill, the union president, joined a picket line outside the plant. When a non-union employee tried to report to work, Thornhill peacefully told him the workers were on strike and didn't want anyone going in to work; the employee turned around and went home. Thornhill was arrested and convicted under an Alabama law banning loitering and picketing near a business meant to discourage people from doing business with it.
The question before the Court
Could a state make it a crime to picket or hang around near a business to encourage a labor boycott, without proving any real threat to public safety?
Why it matters
Workers, unions, and anyone trying to publicize a dispute with a business gained constitutional protection against being criminally punished simply for standing near a workplace or carrying a picket sign, even peacefully. States could no longer write broad anti-picketing laws that swept in all public communication about labor disputes without narrowly targeting real threats to safety or property.
What changes now
The Alabama conviction is reversed, and the statute cannot be enforced as written because it violates the Constitution on its face. The ruling does not send the case back for a new trial under a narrower law; instead, it establishes that peaceful picketing and publicizing a labor dispute are protected speech, meaning states must write any future restrictions narrowly to target actual violence or serious harm rather than banning peaceful communication altogether.
What this does not decide
The Court made clear it was not deciding whether mass picketing, or picketing conducted in a way that creates an immediate danger to safety or property, could be restricted by a narrowly drawn law. It addressed only this broad, unlimited statute, not laws targeting violence or coercion specifically.
Concurrences and dissents
Dissent — Justice McReynolds
Justice McReynolds dissented without opinion, stating only that he believed the judgment below should be affirmed, meaning he would have upheld Thornhill's conviction and the Alabama anti-picketing statute.
How the Court got there
The legal reasoning, step by step
- The Court explained that free speech and free press protections under the First Amendment apply against the states through the Fourteenth Amendment, and that courts must weigh the circumstances and assess how substantial the government's reasons are before allowing restrictions on that speech.
- Because the conviction rested on a general verdict tracking the statute's own broad language, the Court reviewed the law on its face rather than limiting its review to the specific facts proven at trial, reasoning that a conviction on an unproven or unclear charge would deny due process.
- The Court found that the law's vague terms — like 'without just cause,' 'loiter,' and 'picket' — were not limited to violent or coercive conduct, so the statute reached virtually any peaceful way of publicizing a labor dispute near a business, including calm conversations, signs, and pamphlets.
- The Court held that informing the public about a labor dispute is exactly the kind of speech on a matter of public concern that the Constitution protects, since labor conditions affect the broader public, not just the employer and employees directly involved.
- Applying the principle that speech may only be restricted when there is a clear and immediate danger of serious harm, the Court concluded that the mere possibility some listeners might decide not to patronize the business did not amount to the kind of danger that justifies suppressing peaceful discussion.
- Because the statute swept far beyond any narrowly tailored effort to prevent violence or protect property and instead broadly outlawed peaceful publicity about labor disputes, the Court found it invalid on its face under the First and Fourteenth Amendments.