For the last several years, dating back to the Iraq War’s low point, it has been the vogue to speak of “nation-building at home.” It is intended as a pun: usually when we talk about “nation-building” we mean the work of establishing in other countries the institutions and values necessary for political stability. Those who speak of “nation-building at home” imply that the cost of overseas interventions has left the United States in a condition of disrepair. They suggest that money being spent abroad would be better spent on domestic projects, including on a more literal kind of nation-building — the construction and repair of roads, railroads, bridges, dams, pipelines, and the other elements of infrastructure.