Mormon then made the observation that “there could not be a happier people among all the people who had been created by the hand of God.” In the temple, we learn that one of the first commandments given to Adam and Eve was the commandment to “be happy.” When we strive to be happy, the Lord will help us to fulfill this commandment to the greatest extent possible.
In summary, Mormon provided a detailed description of the Nephites who created a peaceful and righteous society by the way they believed, behaved, and lived. Perhaps applying this list of ways to live in a Christ-like community will lead modern saints to be as delightsome and happy as the Nephites in this era. Mormon had seen our day. Undoubtedly, he recorded the ideas that felt would be most valuable to his future audiences.
Book of Mormon Central, “Why did Peace Last So Long in 4 Nephi? (4 Nephi 1:16),” KnoWhy 225 (November 7, 2016).