Monarchia is made up of three books, of which the most significant is the third, in which Dante most explicitly confronts the subject of relations between the pope and the emperor. Dante first condemns the
hierocratic conception of the pope's power elaborated by the Roman Church with the
theory of the Sun and the Moon and solemnly confirmed by the
papal bull Unam sanctam of 1302. The hierocratic conception assigned all power to the pope, making his authority superior to that of the emperor: this meant that the pope could legitimately intervene in matters usually regarded as secular. Against this hierocratic conception, Dante argued a need for another strong power, the Holy Roman emperor, proposing that man pursues two ends: the happiness of earthly life and of eternal life. Dante argued that the pope is assigned the management of men's eternal life (the higher of the two), but the emperor the task of leading men towards earthly happiness. From this he distinguishes the autonomy of the temporal sphere under the emperor from the spiritual sphere under the popethe pontiff's authority should not influence that of the emperor in his tasks. Dante wanted to demonstrate that the Holy Roman emperor and the pope were both human and that both derived their power and authority directly from God. To understand this, it is necessary to think that man is the only thing to occupy an intermediate position between corruptibility and incorruptibility. If it is considered that man is made up of only two parts, that is to say the soul and the body, only in regard to the soul is he incorruptible. Man, then, has the function of uniting corruptibility with incorruptibility. The pope and emperor were both human, and no peer had power over another peer. Only a higher power could judge the two "equal swords", as each was given power by God to rule over his respective domain. ==English editions==