Although a parody can be considered a derivative work under United States Copyright Law, it can be protected under the fair use doctrine, which is codified in 17 USC § 107. The Supreme Court of the United States stated that parody "is the use of some elements of a prior author's composition to create a new one that, at least in part, comments on that author's works." That commentary function provides some justification for use of the older work. See Campbell v. Acuff-Rose Music, Inc.
In 2001, the United States Court of Appeals, 11th Circuit, in Suntrust v. Houghton Mifflin, upheld the right of Alice Randall to publish a parody of Gone with the Wind called The Wind Done Gone, which told the same story from the point of view of Scarlett O'Hara's slaves, who were glad to be rid of her.