The book of Omni was obviously named for Omni, even though he only wrote what we have as three verses. With such a small entry on the plates, his son apparently decided that there was no reason to create a new book, therefore, he wrote in his father’s book. That decision would influence the rest of those in the lineage who would write on the small plates. Until the last man wrote, the lineage kept the records, but said little. Ammaron’s contribution is in four modern verses, but not much more information than was contained in his father’s three.
The theme that Omni broached was that there were wars and contentions, only implying, by noting the wars, that the Nephites were not fulfilling their part of the covenant of the land. Amaron was more explicit. There is destruction among the Nephites, which Amaron suggests was the more wicked part. According to the promise of the land, this was expected. Only wickedness would lead to the absence of the Lord’s protection, which then led to the destruction. Amaron is very clear, in verses 6 and 7, that the Lord did preserve those who were righteous. Thus, Amaron is verifying that the promise of the land still applied.
As with Omni’s record, much of what Amaron has to say is about wars and contentions, and, therefore, not the subject to be written in the small plates. Therefore, he has little to say, and passes the plates to his brother, Chemish.