From the earliest days of the web, David Weinberger has been a pioneering thought leader about the internet's effect on our lives, on our businesses, and most of all on our ideas. He has contributed to areas ranging from marketing and libraries to politics and journalism as a strategic marketing VP and consultant, an internet adviser to presidential campaigns, an early social-networking entrepreneur, a writer-in-residence at Google, a senior researcher at Harvard's Berkman Klein Center for Internet & Society, a fellow at Harvard's Shorenstein Center on Media, Politics and Public Policy, a Franklin Fellow at the US State Department, and a philosophy professor. His writing has appeared in publications from Wired to Harvard Business Review, and his books include the bestselling The Cluetrain Manifesto.