1957    In Roth v. United States, the U.S. Supreme Court rules that obscenity is not protected by the First Amendment .

1971    The United States Supreme Court overturns the conviction of Paul Cohen for disturbing the peace, setting the precedent that vulgar writing is protected under the First Amendment.

1997    The U.S. Supreme Court rules that the Communications Decency Act violates the First Amendment to the United States Constitution.