The doctrine states that speech that will cause, or has as its purpose, "imminent lawless action" (such as a riot) does not have constitutional protection. As of 2008, "imminent lawless action" continues to be the test applied in free speech cases.
Unfree Speech: The Folly of Campaign Finance Reform & Voting with Dollars: A New Paradigm for Campaign Finance.
May 01, 2003; UNFREE SPEECH: THE FOLLY OF CAMPAIGN FINANCE REFORM. By Bradley A. Smith. Princeton: Princeton University Press. 2001. Pp. xiv,...