A rewritten and expanded version of his Freedom of Speech (1920), the seminal work that established modern First Amendment theory, this work became a foremost text of U.S. libertarian thought and influenced the jurisprudence of Oliver Wendell Holmes, Jr. and Louis Brandeis. It considers, along with other related topics, the social necessity of free speech in the United States from the 1920's through 1941, freedom of speech in the Constitution, relevant cases in the Supreme Court under Hughes, war-time prosecutions, legislation against sedition. xviii, 634 pp.