The Social Citizen is the best, most thorough, and most methodologically sophisticated treatment of the role of social networks in political behavior that I have ever read. Betsy Sinclair shows just how strongly we are influenced to express ourselves politically by our family, neighbors, and friends. We are on the verge of a sea change in political science, and this will be one of the most important books we refer to when we describe what happened to the discipline in the twenty-first century.