As to both Church and State, mediaeval political theory was predominantly monarchical. Ideally this flowed from the thought of God as the true monarch of the universe. Practically it comported with mediaeval social conditions. Under Innocent III., if not under Gregory VII., the Church had become a monarchy well-nigh absolute.[413] The pope’s power continued plenary until the great schism and the age of councils evoked by it. For the secular state, the common voice likewise favoured monarchy. The unity of the social organism is best effected by the singleness of its head. Thomas Aquinas authoritatively reasons thus, and Dante maintains that as the unifying principle is Will, the will of one man is the best means to realize it.[414] But monarchy is no absolute right existing for the ruler’s benefit, rather it is an office to be righteously exercised for the good of the community. The monarch’s power is limited, and if his command outrages law or right, it is a nullity; his subjects need not obey, and the principle applies, that it is better to obey God than man. Even when, as in the days of the Hohenstaufen, the civil jurists claimed for the emperor the _plenitudo potestatis_ of a Roman Caesar, the opposite doctrine held strong, which gave him only a limited power, in its nature conditioned on its rightful exercise. Moreover, rights of the community were not unrecognized, and indeed were supported by elaborate theories as the Middle Ages advanced to their climacteric. The thought of a contract between ruler and people frequently appears, and reference to the contract made at Hebron between David and the people of Israel (2 Sam. v. 3). The civil jurist also looked back to the principle of the _jus gentium_ giving to every free people the right to choose a ruler; also to that famous text of the _Digest_, where, through the _lex regia_, the people were said to have conferred their powers upon the princeps.[415] With such thoughts of the people’s rights came theories of representation and of the monarch as the people’s representative; and Roman corporation law supplied the rules for mediaeval representative assemblies, lay and clerical.[416]