Clear and present danger was the First Amendment test the Supreme Court used from 1919 to 1969 to decide when the government could punish speech. It asked whether the words created an immediate, serious risk of a harm Congress had the power to prevent.1LII / Legal Information Institute. Clear and Present Danger The Court replaced it in 1969 with the stricter “imminent lawless action” standard from Brandenburg v. Ohio, and that newer test is what actually governs speech prosecutions today.2Justia. Brandenburg v. Ohio, 395 U.S. 444 (1969) The older phrase still shows up in arguments and opinions because it framed how American courts learned to think about the edge of protected expression.
Where the Phrase Comes From
The test was born in wartime. Charles Schenck, an official in the Socialist Party, mailed leaflets to men eligible for the World War I draft, arguing conscription was a form of involuntary servitude barred by the Thirteenth Amendment and urging them to resist, though only through peaceful means. He was charged under the Espionage Act of 1917 with attempting to cause insubordination in the military and obstruct recruitment.
In a unanimous 1919 opinion, Justice Oliver Wendell Holmes Jr. upheld the conviction and gave the doctrine its name. Speech loses First Amendment protection, Holmes wrote, when it creates a “clear and present danger” of bringing about harms that Congress has the power to prevent.3LII / Legal Information Institute. Schenck v. United States (1919) Two conditions had to be met independently: the harm had to be real and substantial, and it had to be close in time rather than speculative.1LII / Legal Information Institute. Clear and Present Danger
How the Test Drifted From What Holmes Meant
Within months, Holmes himself was uneasy with how the government was using his words. In Abrams v. United States later that same year, the Court upheld the convictions of Russian immigrants who had distributed leaflets criticizing U.S. military intervention in Russia. Holmes dissented, joined by Justice Louis Brandeis, and introduced what became known as the marketplace of ideas: society benefits more from the free exchange of ideas than from suppressing speech that makes the government uncomfortable. The author of the test was already saying the majority had stretched it too far.
The stretching continued. In Whitney v. California (1927), Charlotte Anita Whitney was convicted under a state criminal syndicalism law for helping organize the Communist Labor Party of California. The Court unanimously affirmed, holding that a state could punish speech “tending to incite crime, disturb the public peace, or endanger the foundations of organized government.”4U.S. Reports. Whitney v. California, 274 U.S. 357 (1927) Brandeis’s concurrence, arguing that the remedy for dangerous speech is more speech rather than enforced silence, would outlast the majority opinion.
Then came the Cold War. In Dennis v. United States (1951), the Court upheld the Smith Act convictions of Communist Party leaders for organizing a group that taught the overthrow of the government by force. Chief Justice Fred Vinson reframed the doctrine: courts should ask “whether the gravity of the evil, discounted by its improbability, justifies such invasion of free speech as is necessary to avoid the danger.”5Justia. Dennis v. United States, 341 U.S. 494 (1951) In practice, that formula let the government punish talk about revolution even when no revolution was remotely likely, as long as the potential harm was grave enough. By 1951 the test looked almost nothing like Holmes’s original.
What Replaced It: Brandenburg v. Ohio
The Supreme Court cut the doctrine off and replaced it in 1969. Clarence Brandenburg, a Ku Klux Klan leader in Ohio, invited a television crew to a rally where he used racist language and suggested “some vengeance” might be necessary. Ohio convicted him under a criminal syndicalism statute. A unanimous Supreme Court reversed and struck the statute down.
Under the new rule, the government cannot punish advocacy of illegal action unless two things are true at once: the speech is directed at inciting imminent lawless action, and the speech is likely to produce that action.6LII / Legal Information Institute. Brandenburg Test Both prongs matter. Abstract advocacy of revolution, the kind Dennis had allowed prosecutors to reach, is now protected. Vague calls for future action, however inflammatory, are protected.
Hess v. Indiana (1973) showed how strictly the Court applies this. During a campus anti-war demonstration, a protester loudly said, “We’ll take the fucking street later.” Indiana charged him with disorderly conduct. The Court reversed, finding no evidence the words were directed at any particular person or group and no evidence they were intended or likely to cause immediate disorder.7Justia. Hess v. Indiana, 414 U.S. 105 (1973) Because the statement referred at most to some indefinite future moment, it was protected. That is where most prosecutions of protest speech collapse: the government almost never can prove the audience was on the verge of acting and the speaker meant to trigger exactly that.
How Courts Actually Apply the Modern Test
Two factors do the work: imminence and likelihood.
Imminence asks how close in time the lawless act is. Saying “we should burn this building down someday” is protected. Handing out torches in front of the building and saying “let’s burn it now” is not. The tighter the link in time and specificity between the words and actual violence, the more vulnerable the speech becomes. Hess drew that line by showing that even angry words during a live protest are protected if they point to some vague later moment rather than an immediate act.7Justia. Hess v. Indiana, 414 U.S. 105 (1973)
Likelihood asks whether the audience could actually carry out the act. A person alone online, ranting about overthrowing the government, is almost certainly protected because there is no audience poised to act. A speaker in front of an armed and agitated crowd is a different case. Courts look at the size and mood of the audience, whether means of violence are at hand, and whether the crowd has already been engaged in violent conduct.
When the government restricts speech because of its content, courts apply strict scrutiny, the most demanding standard of review. The government must show a compelling interest and prove the restriction is narrowly tailored, using the least restrictive means available.8LII / Legal Information Institute. Strict Scrutiny
Where the Doctrine Does Not Reach
Brandenburg governs incitement. It does not govern every category of speech the government can punish, and confusing the categories is a common mistake.
True threats are one such category. These are statements that communicate a serious intent to commit violence against a specific person or group, and they do not require any crowd or call to collective action. In Counterman v. Colorado (2023), the Supreme Court held that convicting someone for a true threat requires at least a showing of recklessness, meaning the speaker consciously disregarded a substantial risk that the words would be understood as threatening violence.9Supreme Court of the United States. Counterman v. Colorado (2023) How a reasonable listener would read the words is not enough by itself.
Fighting words are another. The Court defined them in Chaplinsky v. New Hampshire (1942) as words that by their very utterance tend to incite an immediate breach of the peace.10LII / Legal Information Institute. Fighting Words The category is narrow. Speech that merely invites dispute or causes unrest is protected; only face-to-face provocations likely to trigger an instant violent reaction from the person hearing them qualify.
Why the Older Phrase Still Matters
Clear and present danger no longer decides cases, but the phrase persists because it framed the question American courts still ask: how close, and how likely, does harm from speech have to be before the government can step in? The story from Schenck through Dennis is largely a record of the government overreacting to perceived threats and the Court eventually pulling back. Brandenburg’s two-prong test was a direct response to those abuses, and it remains the strongest protection American law offers for inflammatory political speech.6LII / Legal Information Institute. Brandenburg Test
Social media puts pressure on the newer test in ways the 1969 Court did not face. A post advocating violence can reach millions in minutes, which makes the likelihood prong harder to evaluate. A call to action in a small closed group is not the same as the same words broadcast to hundreds of thousands of followers, some of whom may already be primed to act. Courts are still working out how imminence and likelihood translate when geographic distance between speaker and audience no longer means much. The doctrine that answers those questions is Brandenburg, not clear and present danger, but the older language is still the shorthand people use when they ask where the line should be.