In his account of the journeys of the Jaredites, Moroni included information about the land of promise to which Jared and his people traveled. In Studies in Scripture, Vol. 8: Alma 30 to Moroni, Kent P. Jackson wrote:
"Certainly he MoroniT was in a unique position to write about the covenants and curses associated with a promised land. He knew the history of his own people and had himself witnessed their destruction. He also knew the final end of the Jaredite civilization, which makes his comments on their beginning most meaningful. He made his point clearly:" `Whoso should possess this land of promise . . . shall serve God, or they shall be swept off when the fulness of his wrath shall come upon them. . . .' (Eth. 2:8-9.)
"Those who desire to live in a land of promise must serve the true and only God," continued Jackson. "Moroni was speaking of the Americas, which was the promised land to the peoples of the Book of Mormon - the Jaredites, the Mulekites, and the Lehites. As he mentioned in verse 10, it was `choice above all other lands.'
"Because the land was so vast, fertile, and rich, both the Nephites and the Jaredites were able to become extremely prosperous within a short time after their arrivals. (1 Ne. 18:24-25; Eth. 6:28.) But when Moroni wrote his record, both of those civilizations had already gone to ruin for failing to serve God. He was not writing to them but to us in the latter days, the modern readers of his book."
Jackson said Moroni, who saw the world in the last days, "gave somber warnings to the people of our time, explaining why the records of these fallen peoples were preserved for our benefit. . . .
"Perhaps Moroni had in mind specifically those modern readers who would live in the land once promised to his own people - America - whose inhabitants now are already, collectively speaking `ripening in their iniquity.' But his warnings are appropriate for all people everywhere, for all nations are ripening in iniquity. He wrote these words so people in all lands could repent and avoid the calamities to which the Jaredites and his own people had subjected themselves.' "