<p> Historians of the Middle Ages have long reflected on the chronicles and archival sources of Western Europe, seeking to find the birth of the modern state. This thesis represents one such contribution to this historical problem, exploring the question of political centralization in the kingdom of France during the reigns of Capetian kings between 1151 and 1247. Focusing on the county of Anjou, this thesis contends that local aristocrats not only constructed their own political community but also used local customs to shape the contours of centralization in Anjou. Angevin sources suggest that state-building in France emerged less from conquest and occupation than as the result of cooperation between the political center and peripheral communities. The kings of France benefited from the loyalty of the Angevin political community, while local elites used royal concessions to define and defend their political and legal rights as Angevins.</p>