First, steam power replaced muscle power and launched the Industrial Revolution. Then Henry Ford’s assembly line, along with advances in steel and plastic, ushered in the Second Industrial Revolution. Next came silicon and the Information Age. Each era was fueled by a faster, cheaper, and more widely available method of production that kicked efficiency to the next level and transformed the world Now we have armies of amateurs, happy to work for free. Call it the Age of Peer Production. From Amazon.com to MySpace to craigslist, the most successful Web companies are building business models based on user-generated content.