David Weinberger of Harvard University's Berkman Center for Internet & Society and author of Too Big to Know, talks with EconTalk host Russ Roberts about the ideas in the book--how knowledge and data and our understanding of the world around us are being changed by the internet. Weinberger discusses knowledge and how it is attained have changed over time, particularly with the advent of the internet. He argues the internet has dispersed the power of authority and expertise. And he discusses whether the internet is making us smarter or stupider, and the costs and benefits of being able to tailor information to one's own interests and biases.