Alma 51:21

And thus Moroni put an end to those king-men, that there were not any known by the appellation of king-men; and thus he put an end to the stubbornness, and the pride of those people which professed the blood of nobility; but they were brought down to humble themselves like unto their brethren, and to fight valiantly for their freedom from bondage.

Moroni ended the king-men. No one was called king-men anymore. He ended the stubbornness and pride of those people who thought they were better because of their rich families. They had to act like their brothers and fight hard for their freedom.

Moroni wiped out the king-men. No one would be known by that name again. He ended the stubbornness and pride of those who claimed noble blood. They were humbled and made to fight alongside their brothers for freedom from slavery.