Why is speech that advocates action at an unspecified future time generally protected?

Under the First Amendment to the United States Constitution, speech is generally protected unless it falls into narrow, historically rooted exceptions, such as incitement.

The Supreme Court established in Brandenburg v. Ohio (1969) that the government may only restrict speech that is both "directed at inciting or producing imminent lawless action" and "likely to incite or produce such action".12

Speech that advocates for illegal acts at an unspecified future time is protected because it lacks the necessary element of imminence required to create a "clear and present danger" of lawless conduct. By requiring that the threat of harm be immediate, the law ensures that the government does not overreach by punishing abstract advocacy or political rhetoric, thereby upholding the fundamental principle of robust free expression.12