If Benjamin's story was similar to Melchizedek's then to be known as the Prince of Peace meant that he had to really work on the people’s righteousness. There had to be meeting with the people on a daily basis and like Benjamin a lot of public speaking. It is no wonder that someone like Abraham and Mosiah came out of such kingdoms with the spirit burning in their souls and a strong desire to follow Christ that lasted for many generations.
I know that there has been other kings mentioned in the scriptures but they were not prophets (as far as my memory serves) and because of that may of got in some trouble because they were not the mouth piece of God. They had the prophet close but like the Holy Ghost drew close or away based on personal decisions. I know that you are all thinking about David and Salomon but I want to remind you that there were other kings and princes that are not mentioned or briefly mentioned in the scriptures that had access to the prophet and didn't take it.
There has been conquering governments that had Israel in it and they have succeeded because of the righteousness of the king, for example Egypt and Babylon had success because of a righteous people living in the land. The moment that the people left or more importantly righteousness left the government failed. The same is true in the Book of Mormon where people just fell from grace and turn their faces away from the Lord and war, pestilence and famine destroyed a once delight-some people.
Though we do not have a prophet king in our mist, let us look to the example of the children of Israel and be a righteous and delight-some people by doing the basics; praying, reading the scriptures, repenting and partaking of the sacrament.
In the name of Jesus Christ, Amen.