The Book of Jarom… is the fifth book in the Book of Mormon….
Jarom opens up explaining that his father, Enos, commanded him to continue writing that a record of their genealogy might be kept. Jarom explains that there are many among him that have hardened their hearts and have made their necks stiff. However, he explains that those who are not stiffnecked; “…have communion with the Holy Spirit, which maketh manifest unto the children of men, according to their faith.” (Jarom 1:4) In other words, those who have Faith and do not harden their hearts or make their necks stiff can receive the Holy Ghost.
Jarom explains that 200 years have passed since Nephi, and the people of Nephi have been diligent in keeping the commandments of God. Because of their obedience, God has blessed them to be a mighty nation, with all manner of riches and weapons of war. The Lamanites on the other hand were larger in number, but stood no chance at overtaking the Nephites. The Nephites were blessed to have;
“…gold…silver… fine workmanship of wood, in buildings, and in machinery… iron… copper… brass… steel… [and] weapons of war…” (Jarom 1:8)
However, there were some among the Nephites that were not following all the commandments, and because of this God urged the Prophets to heed warnings to the people to avoid sin. God promised that if they fell into transgression that the Nephites would be wiped off the face of the land. These teachings were a success, because the people of Nephi were continually repenting of their sins. Jarom hands off the plates to his son Omni.
Looking at this from the point of view of the United States in 2015, we see a similar situation, where sin is rampant and the warnings of God are everywhere. If the people do not repent and change their ways, God will bring destruction to the United States and to many parts of the world.