I began to see legibility as a central problem in statecraft. The premodern.state was, in many crucial respects, partially blind; it knew precious little about its subjects, their wealth, their land-holdings and yields, their location, their very identity. It lacked anything like a detailed “map” of its terrain and its people. It lacked,for the most part, a measure, a metric, that would allow it to “translate” what it knew into a common standard necessary for a synoptic view. As a result, its interventions were often crude and self-defeating.