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Human
skin color, one of the most visible forms of human racial differences,
did not arise randomly. Instead, it reflects thousands of years of
adaptation to varying levels of ultraviolet (UV) radiation across the
globe. Maps that show global skin pigmentation reveal a striking
pattern: the darkest tones cluster near the equator, while lighter tones
appear in regions far to the north or south. This gradient corresponds
closely with sunlight intensity, turning skin color into a living record
of human migration and environmental adaptation.
The Equator: Birthplace of Darker Pigmentation
Evolutionists
believe early humans evolved in equatorial Africa, where sunlight is
intense year-round. High UV exposure posed two major biological risks:
• DNA damage, which increases skin cancer risk, and
• Folate depletion, which can lead to severe reproductive and developmental problems.
Melanin—our
natural pigment—acts as a biological shield. It scatters and absorbs UV
radiation before it can cause harm. As a result, populations living in
regions with extreme sunlight developed darker skin, which helped
protect vital biological functions. This adaptation wasn’t cosmetic—it
was survival.
Migration North: When Too Much Melanin Became a Disadvantage
As
humans left Africa and ventured into Europe, Central Asia, and
eventually the far north, they encountered dramatically different
sunlight conditions. Cloudy skies, long winters, and low UV levels is
believed to have created a new evolutionary pressure. While melanin
protected against excess UV, it also blocked UVB rays needed for Vitamin
D synthesis. Without enough Vitamin D, populations were at risk of
weakened bones, rickets, and compromised immune function.
Over
generations, natural selection favored individuals with lighter
skin—people who could more efficiently absorb the limited UVB available
and produce sufficient Vitamin D. This gradual shift created the lighter
skin tones common today in northern Europe, Siberia, and parts of East
Asia.
Marxists,
purveyors of a dogma that prefers human homogeneity, prefer to believe
that white Europeans were dark skinned as late as 3,000 years ago. I refute that dogma here ►
Not a Perfect Gradient: The Exceptions Tell a Story
Although the global pattern is clear, there are important nuances:
Arctic populations,
such as the Inuit, have relatively darker skin than their latitude
suggests. Their seafood-rich diets historically supplied abundant
Vitamin D, reducing the selective pressure to lighten skin.
Aboriginal Australians
evolved (or retained) dark skin for the same core reason as populations
in equatorial Africa and parts of South Asia: intense UV radiation.
Australia—especially northern and central Australia—has some of the
highest UV levels on the planet. For at least 50,000–65,000 years, the
ancestors of today’s Aboriginal peoples lived in this high-UV
environment.
Cultural habits—such as clothing and shelter—also influenced UV exposure and slowed certain evolutionary changes.
Genetic
variation in pigmentation evolved through different mutations in
different regions, showing there wasn’t a single “light skin gene.”
These complexities reveal that human evolution is flexible, multifaceted, and deeply tied to environment, diet, and culture.
A Biological Adaptation, Not a Social Divider
When
viewed through this evolutionary lens, skin color becomes a testament
to human adaptability crafted by sunlight, as well as a marker of racial
categories. It reflects where our ancestors lived, how they survived,
and how they interacted with the natural world. Far from dividing us,
the story of skin pigmentation underscores a profound truth: all humans
are shaped by the same evolutionary forces, only expressed differently
across geography and time.
And that leads to another question related to adaptability: What other racial traits were crafted by environmental evolutionary pressures?
American Indians and skin color
I often wondered why American Indians didn’t “turn white” after thousands of years of living in similar latitudes and environments as Europeans.
Again, I powered up the PC, did my due diligence, and found solid, scientific answers:
Different migration histories and selection pressures
Ancestors of modern Europeans left Africa ~60,000–70,000 years ago and moved into northern latitudes with low UV radiation. Lighter skin evolved relatively recently (mostly within the last 8,000–20,000 years) through strong positive selection on genes such as SLC24A5, SLC45A2, and others to allow better vitamin D synthesis in cloudy, high-latitude environments.
Ancestors of Native Americans also left Africa, but they took the Beringian route across Siberia into the Americas ~15,000–25,000 years ago. At that time, their ancestors (ancient North Eurasians and East Asians) already had light-to-intermediate skin genetics adapted to northern Asia. When they entered the Americas, many groups moved south rapidly into medium and low latitudes (from Canada to Patagonia), where UV levels are moderate to very high. In those environments, the selection pressure favored retaining darker or medium-brown skin to protect against UV damage (folate destruction, skin cancer, etc.), so the very light skin alleles common in Europeans never became widespread.
Time scale of evolution
The dramatic lightening of European skin happened after the ancestors of American Indians had already split off and migrated across Beringia. Once populations were separated, they evolved independently under different UV regimes. Even 15,000 years is generally not enough time for entirely new major skin-color mutations to arise and sweep through large populations, especially when the existing East Asian-derived alleles already provided adequate UV protection in the Americas. This debunks the popular woke-left myth that Europeans turned white 3,000 years ago.Genetic evidence
Most Indian populations carry the derived (light-skin) allele of SLC24A5 at very low frequency or not at all, unlike Europeans who are nearly fixed for it (~98–100%).
They predominantly carry ancestral (darker) alleles at several other key pigmentation genes (e.g., OCA2, TYR, KITLG).
Some northern Indian groups (Inuit, Yupik, Athabascans) are somewhat lighter than equatorial South American groups, showing that modest adaptation within the Americas did occur, but they still do not reach European levels of lightness because they started from a different genetic baseline and had less extreme vitamin-D selection pressure (high dietary vitamin D from marine mammals reduces the need for very light skin).
Tanning ability vs. constitutive skin color
Europeans have low constitutive (baseline) melanin but high tanning response. Many Native Americans have higher constitutive melanin and a more limited tanning range. So even when both groups are exposed to the same sun, the Native American baseline stays darker.
In short, Indians are not white when exposed to the same environments as Europeans because their ancestors experienced different intensities and durations of natural selection for skin pigmentation after the major human populations split apart. Skin color is a classic example of convergent evolution (light skin evolved independently in Europe and East Asia), but the specific mutations and timing differed, so the Americas inherited the East Asian rather than the European set of light-skin alleles.
A final thought:
When Christopher Columbus set sail in 1492, there was no place called India. What is now called India was, at the time, known as Hindustan. So why did Columbus call the natives Indians. Some say it is the anglicized term, in dios, or “in God”.
The late George Carlin explained, “Now, the Indians. I call them Indians because that’s what they are. They’re Indians. There’s nothing wrong with the word Indian. First of all, it’s important to know that the word Indian does not derive from Columbus mistakenly believing he had reached “India”. India was not even called by that name in 1492; it was known as Hindustan. More likely, the word Indian comes from Columbus’s description of the people he found here. He was an Italian, and did not speak or write very good Spanish, so in his written accounts he called the Indians ‘Una gente in Dios’. A people in God. In God. In Dios. Indians. It’s a perfectly noble and respectable word.” [source]
https://youtube.com/shorts/K9J11rancaM?si=TQddJUIguwpmmdvO
Sources
Jablonski, N.G. “The Evolution of Human Skin and Skin Color.”
Australian Government / Geoscience Australia – UV Radiation Map
Harvard University – Human Evolutionary Biology: Skin Color
MedlinePlus Genetics – Skin Tone
Sources: Why Indians aren’t white
Here’s How Europeans Quickly Evolved Lighter Skin – Smithsonian Magazine
How Early Humans First Reached the Americas: 3 Theories – HISTORY
Native American genetic ancestry and pigmentation allele contributions to skin color in a Caribbean population – eLife (full paper)
Colours of migration (accessible digest of the above paper) – eLife
Before They Were Native Americans, They Were Beringians – Popular Archaeology
Genetic study provides novel insights into the evolution of skin color – Popular Archaeology
Population differences of two coding SNPs in pigmentation-related genes SLC24A5 and SLC45A2 – PubMed
The light skin allele of SLC24A5 in South Asians and Europeans shares identity by descent – PubMed
Genetic Evidence for the Convergent Evolution of Light Skin in Europeans and East Asians – Molecular Biology and Evolution (Oxford Academic)
An Unexpectedly Complex Architecture for Skin Pigmentation in Africans (includes global comparisons) – Cell
Refining the ideas of “ethnic” skin (constitutive vs. facultative pigmentation) – PMC
Why do Native Americans and Inuit from cloudy climates have more melanin than some white Europeans from sunnier climates? (well-sourced discussion) – Reddit /r/evolution
Sources
Jablonski, N.G. “The Evolution of Human Skin and Skin Color.”
Australian Government / Geoscience Australia – UV Radiation Map
Harvard University – Human Evolutionary Biology: Skin Color
MedlinePlus Genetics – Skin Tone
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