Mosiah asked the people who'd they like to be king.
The people said, "We'd like your son, Aaron, to be king."
3 Now Aaron had gone up to the land of Nephi, therefore the king could not confer the kingdom upon him; neither would Aaron take upon him the kingdom; neither were any of the sons of Mosiah willing to take upon them the kingdom.
But neither Aaron nor any of his brothers wanted to be king.
So Mosiah sent a letter to the people saying,
7 And now if there should be another appointed in his stead, behold I fear there would rise contentions among you. And who knoweth but what my son, to whom the kingdom doth belong, should turn to be angry and draw away a part of this people after him, which would cause wars and contentions among you, which would be the cause of shedding much blood and perverting the way of the Lord, yea, and destroy the souls of many people.
9 And if my son should turn again to his pride and vain things he would recall the things which he had said, and claim his right to the kingdom, which would cause him and also this people to commit much sin.
Aaron doesn't want to be king.
11 Therefore I will be your king the remainder of my days; nevertheless, let us appoint judges, to judge this people according to our law; and we will newly arrange the affairs of this people, for we will appoint wise men to be judges, that will judge this people according to the commandments of God.
13 Therefore, if it were possible that you could have just men to be your kings, who would establish the laws of God, and judge this people according to his commandments, yea, if ye could have men for your kings who would do even as my father Benjamin did for this people -- I say unto you, if this could always be the case then it would be expedient that ye should always have kings to rule over you.
14 And even I myself have labored with all the power and faculties which I have possessed, to teach you the commandments of God, and to establish peace throughout the land, that there should be no wars nor contentions, no stealing, nor plundering, nor murdering, nor any manner of iniquity;
18 Yea, remember king Noah, his wickedness and his abominations, and also the wickedness and abominations of his people. Behold what great destruction did come upon them; and also because of their iniquities they were brought into bondage.
20 But behold, he did deliver them because they did humble themselves before him; and because they cried mightily unto him he did deliver them out of bondage; and thus doth the Lord work with his power in all cases among the children of men, extending the arm of mercy towards them that put their trust in him.
22 For behold, he has his friends in iniquity, and he keepeth his guards about him; and he teareth up the laws of those who have reigned in righteousness before him; and he trampleth under his feet the commandments of God;
23 And he enacteth laws, and sendeth them forth among his people, yea, laws after the manner of his own wickedness; and whosoever doth not obey his laws he causeth to be destroyed; and whosoever doth rebel against him he will send his armies against them to war, and if he can he will destroy them; and thus an unrighteous king doth pervert the ways of all righteousness.
So while I'm alive, I'll be your king.
25 Therefore, choose you by the voice of this people, judges, that ye may be judged according to the laws which have been given you by our fathers, which are correct, and which were given them by the hand of the Lord.
26 Now it is not common that the voice of the people desireth anything contrary to that which is right; but it is common for the lesser part of the people to desire that which is not right; therefore this shall ye observe and make it your law -- to do your business by the voice of the people.
27 And if the time comes that the voice of the people doth choose iniquity, then is the time that the judgments of God will come upon you; yea, then is the time he will visit you with great destruction even as he has hitherto visited this land.
29 If your higher judges do not judge righteous judgments, ye shall cause that a small number of your lower judges should be gathered together, and they shall judge your higher judges, according to the voice of the people.
30 And I command you to do these things in the fear of the Lord; and I command you to do these things, and that ye have no king; that if these people commit sins and iniquities they shall be answered upon their own heads.
After that, judges will be appointed according to the will of the people.
32 And now I desire that this inequality should be no more in this land, especially among this my people; but I desire that this land be a land of liberty, and every man may enjoy his rights and privileges alike, so long as the Lord sees fit that we may live and inherit the land, yea, even as long as any of our posterity remains upon the face of the land.
Everyone should be free and treated equally, with the same rights and privileges.
33 And many more things did king Mosiah write unto them, unfolding unto them all the trials and troubles of a righteous king, yea, all the travails of soul for their people, and also all the murmurings of the people to their king; and he explained it all unto them.
36 Yea, all his iniquities and abominations, and all the wars, and contentions, and bloodshed, and the stealing, and the plundering, and the committing of whoredoms, and all manner of iniquities which cannot be enumerated -- telling them that these things ought not to be, that they were expressly repugnant to the commandments of God.
Mosiah wrote many other things that aren't included here.
He explained it all to them.
Everyone believed everything that he said.
38 Therefore they relinquished their desires for a king, and became exceedingly anxious that every man should have an equal chance throughout all the land; yea, and every man expressed a willingness to answer for his own sins.
39 Therefore, it came to pass that they assembled themselves together in bodies throughout the land, to cast in their voices concerning who should be their judges, to judge them according to the law which had been given them; and they were exceedingly rejoiced because of the liberty which had been granted unto them.
40 And they did wax strong in love towards Mosiah; yea, they did esteem him more than any other man; for they did not look upon him as a tyrant who was seeking for gain, yea, for that lucre which doth corrupt the soul; for he had not exacted riches of them, neither had he delighted in the shedding of blood; but he had established peace in the land, and he had granted unto his people that they should be delivered from all manner of bondage; therefore they did esteem him, yea, exceedingly, beyond measure.
So the people decided not to have a king.
42 And it came to pass that Alma was appointed to be the first chief judge, he being also the high priest, his father having conferred the office upon him, and having given him the charge concerning all the affairs of the church.
They chose Alma Jr., who was already the high priest, as their first chief judge.
46 And it came to pass that Mosiah died also, in the thirty and third year of his reign, being sixty and three years old; making in the whole, five hundred and nine years from the time Lehi left Jerusalem.
Then his father, Alma Sr. died. And King Mosiah died also 509 years after Lehi left Jerusalem.