To have the highly touted editor of a highly touted Web culture organ writing about the innate smartness of interconnectivity seems like a hip, winning combination unless that journal becomes the latest dot-com casualty. Feed, of which Johnson was cofounder and editor-in-chief, recently announced it was shuttering its windows, which should make for a less exuberant launch for his second bricks-and-mortar title, following 1997"s Interface Culture. Yet the book"s premise and execution make it compelling, even without the backstory. In a paradigmatic example here, ants, without leaders or explicit laws, organize themselves into highly complex colonies that adapt to the environment as a single entity, altering size and behavior to suit conditions exhibiting a weird collective intelligence, or what has come to be called emergence. In the first two parts of the book, Johnson ranges over historical examples of such smart interconnectivity, from the silk trade in medieval Florence to the...