Lawyer and activist Lawrence Lessig spent a decade arguing for sensible intellectual property law, updated for the digital age. He was a founding board member of Creative Commons, an organization that builds better copyright practices through principles established first by the open-source software community.

In 2007, just after his last TED Talk, Lessig announced he was leaving the field of IP and Internet policy, and moving on to a more fundamental problem that blocks all types of sensible policy -- the corrupting influence of money in American politics.

In 2011, Lessig founded Rootstrikers, an organization dedicated to changing the influence of money in Congress. In his latest book, Republic, Lost, he shows just how far the U.S. has spun off course -- and how citizens can regain control. As The New York Times wrote about him, “Mr. Lessig’s vision is at once profoundly pessimistic -- the integrity of the nation is collapsing under the best of intentions --and deeply optimistic. Simple legislative surgery, he says, can put the nation back on the path to greatness.”

Read an excerpt of Lessig's new book, Lesterland >>