The entire Book of Mormon, as an account of the Jaredites, Mulekites, and Nephites, stands as a living testimony of the truth-fulness of these conditional promises and prophecies. Because of what he sees with his own people’s destruction and reads of the Jaredites, Moroni speaks plainly to us of the last days. His words echo the warning of the Lord that inhabitants of this promised land will be protected and preserved from bondage only “if they will but serve the God of the land.”
President Joseph Fielding Smith testified of this prophecy: “These passages of scripture from the Book of Mormon are true; this nation is not exempt, and the people, if they continue to pursue the course of evil and ungodliness that they are now treading, shall eventually be punished. If they continue to disregard the warning voice of the Lord, deny their Redeemer, turn from his gospel unto fables and false theories, and rebel against all that he has through his servants in this day declared for the salvation of man; and if they increase in the practice of iniquity, I want to say to you, that if they do these things, the judgments of the Lord will come upon this land, and this nation will not be saved; we will not be spared from war, from famine, from pestilence and finally from destruction, as a nation.”