For decades, scholars have debated where the Book of Mormon took place. Could it be on the Baja Peninsula? Or in the narrow necks of Central America, or the heartland of the United States? But what if the internal map of the text—where ‘east’ is truly east and seeds from Jerusalem flourish—points to a location largely ignored by archaeologists? In this comprehensive interview, David Rosenvall details how a simple question from his father, a university geography professor, led to a decade of research identifying the Baja Peninsula as the most plausible setting for Lehi’s journey. Rosenvall challenges the dominant theories by distinguishing between ‘human geography’—culture that moves with people—and ‘physical geography,’ the immovable features of land, climate, and mineral deposits that he claims uniquely match the Baja landscape.
Check out our other conversations on DNA & Book of Mormon: https://gospeltangents.com/lds_theology/dna-book-of-mormon/
0:00 Hofmann Explosion
2:55 Background
5:31 BAJA
7:46 Evaluating Meso
19:27 2 Cumorah Theory
24:12 Rusty Swords
30:49 DNA & Book of Mormon
47:20 Strengths of Baja
Baja Hypothesis: An Engineering Approach to Scripture
In this 2017 series, host Rick Bennett interviews David Rosenvall, the technologist responsible for creating the foundational scriptures.lds.org. Collaborating with his father, a university geography professor, Rosenvall presents a controversial theory that locates the Book of Mormon narrative on the Baja Peninsula. Unlike traditional models based on archaeological artifacts (“human geography”), Rosenvall’s approach utilizes an engineering methodology, modeling the text’s 33,000 geographical statements against the immovable features of the physical world.
Part 1: The Climate Conundrum
A single question was posed by David Rosenvall’s father: Where would seeds from Jerusalem actually grow? As a geographer, his father noted that the text claims seeds brought from Jerusalem “grew exceedingly” in the Promised Land.
• The Climate Argument: Seeds are climate-specific. Jerusalem seeds require a Mediterranean climate (wet winters, dry summers) to flourish, rather than the tropical climate of Mesoamerica or the cold winters of New York. This climatological requirement pointed them directly to the Baja California peninsula.
• The Initial Insight: David admits that years prior, while serving as a missionary in Sweden, he had looked at a map and intuitively felt the geography fit Baja, a thought he shelved until his father’s research confirmed it decades later.
Baja vs. Mesoamerica (Physical vs. Cultural Geography)
Rosenvall critiques the dominant Mesoamerican theory (popularized by John L. Sorenson) by distinguishing between human geography (culture, buildings, artifacts) and physical geography (mountains, rivers, coastlines).
• Culture Moves, Land Does Not: Rosenvall argues that Mesoamerican theorists have successfully identified cultural similarities (human geography) but struggle with physical geography, often having to rotate maps to make “north” fit “east.” He posits that Nephite culture likely migrated to Mesoamerica after the destruction of the Nephite nation, explaining the cultural remnants found there today.
• The Compass Problem: The Baja model accepts the text literally—north is north and east is east—without requiring a directional shift, whereas other models must reconcile the “narrow neck” running east-west rather than north-south.
Part 3: Rusted Swords, Elephants, and the Two Cumorahs
Rosenvall addresses specific scientific and historical challenges to the Book of Mormon, arguing that Baja solves problems that other theories cannot.
• Evidence of Steel: While Mesoamerican theories rely on obsidian (which does not rust), the Book of Mormon describes swords that “cankered with rust.” Rosenvall notes that Baja museums display ancient, rusted metal swords and knives found in local burials, and the peninsula contains the necessary raw deposits of iron, gold, and silver.
• The Animals: Addressing the criticism regarding elephants and horses, Rosenvall points to the La Brea Tar Pits (just north of Baja). He argues these pits contain every animal mentioned in the Book of Mormon, including elephants and camels, proving their biological plausibility in the region.
• Trek to New York: Rosenvall proposes a “Two Hill” theory. The final battles occurred at a Hill Cumorah in Baja. Moroni then spent 36 years traveling northward to bury the plates in New York (the “hill north of Manchester”). Rosenvall calculates that Moroni would only have to walk the distance from Provo to Ogden once a year to make the journey, possibly dedicating the temple site in Manti, Utah, along the way.
Part 4: Solving the DNA Problem (The Asian Connection)
Rosenvall offers a unique solution to the lack of Middle Eastern DNA in Native American populations by focusing on the Book of Ether.
• The Jaredite Route: He theorizes that the Jaredites traveled from the Tower of Babel through China, launching vessels from the eastern seaboard of Asia. Ocean currents would naturally carry them to the North American west coast in roughly 345 days, matching the text’s timeline.
• Asian Ancestry: Because the Jaredites (and potentially others from Asia) arrived thousands of years before Lehi and dispersed across the continent, the dominant DNA profile of the Americas is Asian. The Lehite colony was a small, isolated group whose genetic signature was likely diluted or lost over centuries of intermixing.
Part 5: The “Narrow Neck” and Isolation
Strongest geographical arguments for the Baja Peninsula: isolation and line-of-sight.
• A Land Apart: The text frequently describes the Nephites as being isolated from other civilizations. Baja is naturally isolated by the Sea of Cortez, distinct from the mainland where other cultures (like the Jaredite descendants) might have been spreading.
• Visualizing the Neck: Rosenvall identifies a specific location in Baja where high mountains allow a person to see the ocean on both sides—a physical reality that matches the “narrow neck” and “narrow strip” descriptions in the scripture.
• Chaparral Terrain: He argues the “wilderness” described in the text matches the Baja “chaparral” (dense, thorny brush) where it is difficult to follow tracks, rather than a jungle environment.
Rosenvall concludes by directing listeners to his website, achoiceland.com, emphasizing that while geography is fascinating, the spiritual intent of the book remains paramount.
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