Andrew Hamilton, the Philadelphia lawyer who defended John Peter Zenger in 1735 and introduced a new defense for seditious libel.

The Supreme Court Justice who authored the clear and present danger test for dangerous speech.

The student banner that led to Morse v. Frederick.

Mary Beth and John Tinker and the armbands that caused a First Amendment controversy.

The writer, publisher, and book distributor at the center of Roth v. United States.

The contempt citation filed against this San Francisco labor leader was reversed by the Supreme Court using the clear and present danger test.