The CES Letter presents DNA evidence as if it has already resolved the question of the Book of Mormon’s historicity. The argument is framed as settled science. What the CES Letter does not address are the assumptions required to reach that conclusion, or the limits that geneticists themselves acknowledge when reconstructing ancient population history.
DNA evidence does not function as a historical transcript. It reflects survival, migration, population size, intermarriage, and genetic loss over long periods of time. Treating genetic silence as historical disproof assumes far more certainty than the data can support.
What DNA Can and Cannot Tell Us
The Limits of Genetic Reconstruction
DNA studies rely on modern populations and a limited number of ancient samples to infer the past. These reconstructions depend on assumptions about population continuity, isolation, and survival. When those assumptions are wrong, conclusions must be revised.
The CES Letter assumes that if Near Eastern genetic markers are not detectable today, then they never existed. That assumption is not shared by population geneticists.
Small Populations Leave Fragile Genetic Traces
The Book of Mormon does not describe a massive migration that populated the entire American continent. It describes small groups entering lands already inhabited by others. In population genetics, this distinction matters.
When a small group intermingles with a much larger population, its genetic signal can be diluted or disappear entirely within a relatively short number of generations. This principle is explained in Fair Latter-day Saints’ overview of DNA and the Book of Mormon.
Extinction and Genetic Absence
How Could Extinct Populations Leave DNA?
One question the CES Letter never addresses is this: how would DNA evidence exist for populations the Book of Mormon itself describes as extinct?
The Jaredite civilization is described as being completely destroyed. The Nephite civilization is described as being annihilated, with only a few individuals surviving briefly before extinction. If these populations no longer existed by the end of the record, what genetic signal would remain to detect 1,600 years later?
Survivorship Bias in DNA Studies
DNA evidence overwhelmingly reflects populations that survived, expanded, and dominated. Groups that were absorbed, displaced, or destroyed leave little to no detectable genetic footprint. This is a known limitation of genetic reconstruction, not a controversial claim.
Expecting identifiable DNA from a population the text itself describes as wiped out assumes conditions geneticists do not assume.
The Lamanites and Intermarriage
What Does the Text Actually Describe?
The Book of Mormon describes the Lamanites as those who survived and remained after Nephite destruction. It also describes extensive interaction, migration, and warfare with surrounding populations. It does not describe an isolated, closed genetic group.
Intermarriage or Instant Genetic Change?
The CES Letter treats changes in Lamanite appearance as if they require a sudden, biologically implausible DNA transformation. That framing ignores a more basic question. Did the Lamanites intermarry with existing populations over centuries, or did a single genetic change occur all at once?
Population genetics supports the former. Gradual intermarriage with surrounding groups would alter physical traits over time without leaving a clear Near Eastern genetic signature.
How Can DNA Be Tested Without Knowing Where to Look?
The Geographic Problem
One of the most significant limitations of DNA testing in the Americas is that the Book of Mormon does not specify exact geographic locations. Scholars debate whether the events occurred in Mesoamerica, North America, or another limited region.
Without knowing where the Nephites lived, how can anyone know which modern populations should be tested?
Which Tribes Would Even Be Relevant?
The CES Letter assumes that modern Native American populations can be broadly tested and compared to ancient Near Eastern DNA. That assumption ignores the reality that tribal histories, migrations, and displacements are complex and often poorly documented.
Without knowing which groups, if any, are descended from Lamanite survivors, genetic testing becomes speculative.
How Do You Explain the DNA Evidence That There Is?
Haplogroup X and Its Implications
One detail not addressed in CES Letter is the presence of Haplogroup X among certain Native American populations. This haplogroup is closely related to Middle Eastern and European populations and is not derived from East Asia.
This does not prove the Book of Mormon. But it complicates the claim that all Native American DNA derives exclusively from Asia.
A detailed discussion of Haplogroup X and why it matters is provided here DNA evidence and the Book of Mormon.
Complex Data, Simple Conclusions
Genetic data in the Americas is complex. Multiple migration waves, intermarriage, extinction events, and population bottlenecks all affect results. Treating that complexity as a simple refutation oversimplifies the science.
These limitations are also acknowledged in the Church’s Gospel Topics Essay on the Book of Mormon and DNA Studies, which explains why DNA evidence neither proves nor disproves the Book of Mormon.
Where the DNA Question Actually Stands
DNA evidence does not demonstrate that the Book of Mormon is true. It also does not demonstrate that it is false. What it demonstrates is the danger of overstating what genetic data can reasonably support.
The CES Letter treats uncertainty as closure. Population genetics does not. When extinction, intermarriage, geographic uncertainty, and survivorship bias are acknowledged, the confidence with which DNA is used to dismiss the Book of Mormon becomes difficult to justify.
The unresolved issue is not why DNA fails to answer every question. It is why incomplete data is treated as decisive when it is not.