DEUT892 Do not appoint a non-Jewish king over yourselves. Key concept is that people in positions of authority must speak and act in ways that cause their underlings to accept and submit their decisions. For this reason, the high officials of our nation must be of Jewish seed, for Jews are merciful, having inherited this trait from their fathers. With mercy in their blood, they will exercise their authority with mercy, never oppressing anyone and never abusing their authority. They will love truth, righteousness and virtue. As is known, the descendants of Avraham, Yitzhak and Yaakov possess these qualities inherently. From this main idea of the mitzvah we derive that we are forbidden to appoint over ourselves anyone who is cold, evil or cruel. If such a person is given authority--perhaps because he is a relative, or because people fear him and want to flatter him--evil will not cease from the homes of those who appointed him. One who fears no man and with all of one’s might seek the good of the community will earn unceasing reward from Hashem, in this world and in the next.