The copyright law is in the midst of revolutionary change. We are remaking our world as we adjust to networked digital technology. The borders between legitimate and illegal behavior are the subject of bitter dispute. What we have come to call the conventional entertainment industries-movie studios, music publishers, record companies-have declared war on the new digital media, and the courtrooms are battlefields. It is by now a cliche that the Internet enables individuals to communicate with one another without needing to rely on traditional intermediaries. Novelists can reach readers without a printing press, a publisher, a book distributor or bookstore. Consumers can find music without going through record stores, radio stations, record c...