The author of the breakout hit Here Comes Everybody reveals how new technology is changing us from consumers to collaborators, unleashing a torrent of creative production that will transform our world. For decades, technology encouraged people to squander their time and intellect as passive consumers. Today, tech has finally caught up with human potential. In Cognitive Surplus, internet guru Clay Shirky forecasts the thrilling changes we will all enjoy as new digital technology puts our untapped resources of talent and goodwill to use at last. Since we Americans were suburbanized and educated by the postwar boom, we've had a surfeit of intellect, energy, and time-what Shirky calls a cognitive surplus. But this abundance had little impact on the common good because television consumed the lion's share of it-and we consume TV passively, in isolation from one another. Now, for the first time, people are embracing new media that allow us to pool our efforts at vanishingly low cost. The results of this aggregated effort range from mind expanding-reference tools like Wikipedia-to lifesaving-such as Ushahidi.com, which has allowed Kenyans to sidestep government censorship and report on acts of violence in real time. Clay Shirky teaches at the Interactive Telecommunications Program at NYU, where he researches the interrelated effects of our social and technological networks. He has consulted with a variety of groups working on network design, including Nokia, the BBC, Newscorp, Microsoft, BP, Global Business Network, the Library of Congress, the US Navy, the Libyan government, and Lego. His writings have appeared in the New York Times, the Wall Street Journal, the Times of London, Harvard Business Review, Business 2.0, and Wired.