The Web needs fixing. The standards and recommendations that define the Web were last revised in 1999. Since then, the Web has grown from a document retrieval system into an application delivery system. We have made significant progress since then, due to the cleverness of the Web development community and the surprising expressive power of JavaScript, but we are at the limits. The Web is no longer a driver of innovation. It is now a serious impediment. The Web is overly complex. It is visually underpowered. It is hopelessly insecure. It is now under competitive assault by new proprietary platforms that hope to capture the next generation of applications. Can a system as large and as open as the Web heal and adapt itself to the challenges of the 21st Century?