The Internet was meant to bring a golden age of free communication. Dictatorships would topple and knowledge flourish as the new technology released the captive minds of humanity.From the fall of the Berlin Wall to the advert of the Web, everywhere you turn you are told that we live in age of unparalleled freedom. This is dangerously naive. Nick Cohen looks at how the brave hopes have been dashed in Iran, Burma, China and closer to home in the West. He examines how London has become a centre for libel tourism open to every rich criminal in the world and how corporations can wreck the economy because their employees cannot speak out.