It does not tell us that there was no one here before and after

“We must be careful in the conclusions that we reach. The Book of Mormon teaches the history of three distinct peoples … who came from the old world to this continent. It does not tell us that there was no one here before them. It does not tell us that people did not come after. And so if discoveries are made which suggest differences in race origins, it can very easily be accounted for, and reasonably, for we do believe that other people came to this continent” (in Conference Report, Apr. 1929, Anthony W. Ivins (1852–1934).