arrest. With accelerating velocity, our age's new technologies of social networking are evolving, and evolving us, into new groups doing new things in new ways, and old and new groups alike doing the old things better and more easily. You don't have to have a MySpace page to know that the times they are a changin'. Hierarchical structures that exist to manage the work of groups are seeing their raisons d'tre swiftly eroded by the rising technological tide. Business models are being destroyed, transformed, born at dizzying speeds, and the larger social impact is profound. One of the culture's wisest observers of the transformational power of the new forms of tech-enabled social interaction is Clay Shirky, and Here Comes Everybody is his marvelous reckoning with the ramifications of all this on what we do and who we are. Like Lawrence Lessig on the effect of new technology on regimes of cultural creation, Shirky's assessment of the impact of new technology on the nature and use of groups is marvelously broad minded, lucid, and penetrating; it integrates the views of a number of other thinkers across a broad range of disciplines with his own pioneering work to provide a holistic framework for understanding the opportunities and the threats to the existing order that these new, spontaneous networks of social interaction represent. Wikinomics, yes, but also wikigovernment, wikiculture, wikievery imaginable interest group, including the far from savory. A revolution in social organization has commenced, and Clay Shirky is its brilliant chronicler. A