Buchanan (Ubiquity: The Science of History
) reaches out to the audience for pop social science like The Tipping Point
and Freakonomics
with the concept of "social physics," a scientific model for the patterns that emerge from the interactions among large groups of people. Though his observations that people excel at imitating the successful behavior of others and will often form collective bonds over such fundamental pretenses as shared ethnic heritage aren't startling, Buchanan leans on his background in theoretical physics and treats these ideas as "a quantum revolution in the social sciences." His presentation is muted by a tendency to talk around the subject, recapping prior discussions and promising future developments instead of establishing a clear, compelling thread. Though the real-life scenarios he uses to illustrate his theories—such as the unexpected revival of Times Square or the outbreak of ethnic violence in the former Yugoslavia—are engaging, some sections draw upon computer simulations of arbitrary behavior that illustrate his thesis but don't command equal interest. This is a great idea for a magazine article, but awkward at book length. (June)