Before the sixteenth century the word state was used to refer to the estates of the realm or to kingly office or dignity, but not to an independent political community. Niccolò Machiavelli was largely responsible for establishing this modern usage. The change, however, was not in words only but also in ways of thinking about political organization and political relations. In feudal society a man figured in a network of quasi-contractual relations in which his political rights and duties were closely linked to land tenure and fealty. He was his lord's man and his king's man. The powers of kingship were only with difficulty distinguished from property rights. From the twelfth century on, the conceptions of Roman law began once more to influence political thought. Public authority was more sharply distinguished from private rights; the peculiar position of the king among his barons, which feudal writers recognized but...