The creation of the Web may well be the most important technological invention since Guttenberg's printing press. If that were all, it would be a very bid deal indeed. However, as David Weinberger argues in this book, the Web is something even more than that. For everyone on the planet who has a computer, or access to a computer, the Web provides access to an extra, borderless public world created and sustained by the millions of people who use it. This extra world is something unique in the history of mankind. It has no geography to hold us together, no land beneath us, no planet spinning us, no sky beckoning us. All that holds this world together is our common interest. Matter and geography drops out and we are left with only ourselves.