It is the charge governments reach for against their loudest critics. America wrote one sedition law in 1798 and spent the next two centuries regretting it.
Sedition is speech or conduct that stirs up rebellion or resistance against lawful authority. The trouble is obvious: the line between dangerous incitement and ordinary, sharp criticism of the government is exactly where a free society lives or dies.
America learned this almost immediately. In 1798, a nervous Federalist majority passed the Sedition Act, making it a crime to publish false, scandalous, and malicious writing against the government. In practice it was used to jail newspaper editors and even a congressman for criticizing President John Adams.
The backlash was fierce. Jefferson and Madison argued the law violated the First Amendment, the public turned against it, and the Sedition Act helped sink the Federalists in the election of 1800. The law expired, and history has treated it as a warning, not a model.
The pattern repeated. Later sedition prosecutions, especially during the First World War, are now mostly remembered as overreach, moments when fear of dissent curdled into the criminalizing of speech.
