3 Nephi 7

In a very short time after the great success of the Nephite's war with the Gadianton robbers, and just before the coming of Christ to the Americas, we read that -

"...it came to pass that those judges had many friends and kindreds; and the remainder, yea, even almost all the lawyers and the high priests, did gather themselves together, and unite with the kindreds of those judges who were to be tried according to the law.
28 And they did enter into a covenant one with another, yea, even into that covenant which was given by them of old, which covenant was given and administered by the devil, to combine against all righteousness.
29 Therefore they did combine against the people of the Lord, and enter into a covenant to destroy them, and to deliver those who were guilty of murder from the grasp of justice, which was about to be administered according to the law.
30 And they did set at defiance the law and the rights of their country; and they did covenant one with another to destroy the governor, and to establish a king over the land, that the land should no more be at liberty but should be subject unto kings.
(Book of Mormon | 3 Nephi 6:27 - 30)

Thus -

"...the people were divided one against another; and they did separate one from another into tribes, every man according to his family and his kindred and friends; and thus they did destroy the government of the land.
3 And every tribe did appoint a chief or a leader over them; and thus they became tribes and leaders of tribes.
4 Now behold, there was no man among them save he had much family and many kindreds and friends; therefore their tribes became exceedingly great.
5 Now all this was done, and there were no wars as yet among them; and all this iniquity had come upon the people because they did yield themselves unto the power of Satan.
6 And the regulations of the government were destroyed, because of the secret combination of the friends and kindreds of those who murdered the prophets.
7 And they did cause a great contention in the land, insomuch that the more righteous part of the people had nearly all become wicked; yea, there were but few righteous men among them."  (Book of Mormon | 3 Nephi 7:2 - 7)

It is mind-boggling how fast this happened.  Could this be a great warning to us in our day before the second coming?