“At just the moment when the technologies of borrowing, sharing, repackaging, and reinventing — technologies such as blogs, wikis, peer-to-peer file sharing, full-text searching, digital video, and off-the-shelf music mixing software — have become so powerful as engines for creative expression, copyright law permits, in effect, nothing at all. Just when the future of creative expression looks so promising, argues Lawrence Lessig, the claims of the past have been shored up, and they block the way.”