Whitney v. California, 274 U.S. 357 (1927) (U.S. Supreme Court)
Whitney v. California is a pivotal First Amendment decision from the interwar era in which the Supreme Court upheld a state criminal syndicalism statute used to convict Anita Whitney for her knowing membership in, and association with, a political party alleged to advocate violent means to achieve political change.
Does the First and Fourteenth Amendments prohibit a state from criminalizing knowing membership in, and assistance to, an organization that advocates criminal syndicalism (i.e., unlawful and violent means of political or industrial change), absent proof of an imminent threat of unlawful conduct?
At the time of Whitney, the Court accepted (following Gitlow) that freedom of speech and assembly are fundamental liberties protected from state infringement by the Fourteenth Amendment, but those freedoms are not absolute. A state, exercising its police power, may prohibit advocacy of unlawful conduct and punish those who, with knowledge of an organization's illegal advocacy, assist in organizing or become members of that organization. Under the then-prevailing "bad tendency" or "reasonable tendency" approach, the state need not show imminence of the threatened harm so long as the advocacy or association has a natural and probable tendency to bring about the substantive evils the state has a right to prevent.
Affirmed. California's Criminal Syndicalism Act, and Whitney's conviction for assisting in organizing and knowingly being a member of a party that advocated criminal syndicalism, did not violate the Fourteenth Amendment's protections of speech and assembly as then understood.
Whitney is essential for understanding the evolution of First Amendment doctrine. The Court's affirmance reflects the early 20th-century willingness to uphold broad speech restrictions under the bad-tendency theory, particularly in the context of radical politics and labor unrest. Yet the case is most celebrated for Justice Brandeis's concurrence, which articulated the principles—imminence, seriousness of harm, and the preference for counterspeech—that later became cornerstones of modern free speech law. Brandenburg expressly overruled Whitney's contrary aspects, but Brandeis's analysis remains a canonical statement of why robust protection for political advocacy is central to democratic self-government.