Pacem in Terris §83

⁸³ Moreover, a ruling authority is indispensable to civil society. That is a fact which follows from the moral order itself. Such authority, therefore, cannot be misdirected against the moral order. It would immediately cease to exit, being deprived of its whole raison d'être. God Himself warns us of this: "Hear, therefore, ye kings, and understand: learn, ye that are judges of the ends of the earth. Give ear, you that rule the people, and that please yourselves in multitudes of nations. For power is given you by the Lord, and strength by the Most High, who will examine your works, and search out your thoughts." (53)