Governments now answer to business, not voters. Mainstream parties grow ever harder to distinguish. Is democracy dead? Last September, Il Partito Democratico, the Italian Democratic Party, asked me to talk about politics and the internet at its summer school in Cortona. Political summer schools are usually pleasant — Cortona is a medieval Tuscan hill town ...

Every day, millions of online diarists, or “bloggers,” share their opinions with a global audience. Drawing upon the content of the international media and the World Wide Web, they weave together an elaborate network with agenda-setting power on issues ranging from human rights in China to the U.S. occupation of Iraq. What began as a ...