What is leucism?

For more information on Untenable: Our Fragile Preservation check out the production’s official page.

Across cultures and epochs, the sudden sight of a snow-white animal has stirred both awe and terror. White deer vanishing into misty forests, ivory-colored lions prowling the savanna, or a pallid buffalo calf among its herd—all trigger legends of divinity or doom. In recent years scientists have unpacked the genetics of leucism (a partial loss of pigment), explaining the biology behind these oddities^[1][2]. But for every known white lion or peacock, human stories have woven complex myths about so-called “leucistic people”, sometimes as sacred inheritors of a special bloodline, sometimes as cursed or conspiratorial outcasts. The truth is more prosaic. Nevertheless, echoes of these white legends reach into modern fiction, for example Hugo Lunny’s new drama Untenable: Our Fragile Preservation, in which an immortal family of pale-skinned “Khaldaeons” hides among humans^[3]. This Atlantic-style survey traces leucism from its genetic origins through folklore, real examples, and the dangerous fables it can spawn, ending with how those myths ripple into books and screenplays.

Sacred White Animals and Folklore

In folklore the “white” animal often appears as an omen or messenger. Celtic and medieval legends made the white stag a classic symbol of the Otherworld: knights who chase the elusive white hart are drawn into quests beyond mortal ken^[4]. In one tale St. Eustace bows to a glowing white stag and sees a vision of Christ; in another, the purity of a white elk stands for divine grace. It is notable that in leucism the eyes remain normally colored, unlike true albinism, so these white deer still gaze with dark eyes^[5][4], reinforcing the sense of magic, not malformation.

In southern Africa, a lion cub born nearly pure white was for generations called a “star lion,” a sacred descendant of Sun gods^[6]. The local Shangaan people regarded white cubs as divine gifts: sightings inspired prophecies and were said to herald both fortune and warning. African mythology paints white lions as “messengers from the gods and guardians of the land”^[7]. And in the North American plains, the Sioux and Lakota hold the White Buffalo Calf Woman in reverence: her mythical return in buffalo form brought the holy peace pipe and taught the seven sacred ceremonies. Even a single leucistic bison calf, not an albino but a mutant homozygous recessive, is seen as miraculous. When one appeared in 1994, tribes celebrated it as fulfilling prophecy^[8]. “To American Indians, a White Buffalo Calf is the most sacred living thing on earth,” a U.S. government story explained^[9]. Its birth is a communal omen that “their prayers are being heard” and harmony will be restored^[10].

Many cultures share this awe. In Asia, the white peafowl has similar lore: white peacocks (a rare phenotype of the Indian peafowl) symbolize purity and are sometimes linked to the goddess Saraswati of knowledge. Even ravens, usually dark carrion birds, bear a white mythic counterpart. Greek myth credits Apollo with once possessing a white raven; when it bore bad news, the furious god scorched its feathers to blacken them^[11]. In Japan, stories of the white fox (kitsune) and white stag similarly evoke the uncanny. When animals turn white in real life, due to leucism, not intentional magic, people often interpret it spiritually. (“White” animals are sometimes called glory or ghost creatures.) It is no accident that Lunny’s Untenable has its pale immortals hidden among us: the very idea echoes these enduring myths of white emissaries crossing between our world and something beyond.

Biology of the White Coat

Behind the myths, leucism is simply a genetic quirk affecting pigment cells. Scientists define it as “a variety of conditions” causing partial loss of skin, hair, or feather pigment in animals^[1]. Crucially, leucistic creatures retain normal eye color, only the cells that supply body color (melanocytes from the neural crest) fail or fade^[12]. This distinguishes leucism from albinism (pure albinism is loss of melanin production but not of the cells themselves). In practical terms, a leucistic tiger or bird looks completely white or patchily white with dark eyes, whereas an albino’s eyes often glow red or pink from visible blood vessels^[12].

Biologists have identified many genetic mechanisms. For example, in Bengal tigers a recessive mutation in a tyrosinase gene “turns off” red-yellow pigment (pheomelanin), leaving white fur and blue eyes^[2][12]. The famous captive “white tiger” Mohan (first seen in 1950s India) carried this gene. Tigers inheriting two copies develop the snowy morph. The Wikipedia entry notes: “The white tiger is a leucistic morph of the tiger… its coat is otherwise white or near-white, and it has blue eyes.”^[2] Such white tigers have been widely bred in zoos (despite health issues from inbreeding), but in the wild they are vanishingly rare, only a handful have ever been spotted.

Other species show the same mechanism. Nearly one in 10,000 lionesses in the Timbavati region, for instance, carries the recessive “white lion” allele^[13], so litters sometimes yield the famed white cubs. The Global White Lion Protection Trust even released a pride of them into Kruger Park. Horses can carry dominant white mutations, giving some breeds all-white coats with pink skin^[14]. Birds also sport leucistic morphs: in some aviaries, white peacocks (a leucistic variant of Pavo cristatus) flourish. Their entire tail train glows ivory, yet their eyes remain dark, per the same rule^[12]. Even wild alligators have turned up with ghost-white scales (a 2020 sighting in Florida caused a viral sensation, though that animal likely had a specific pigment-cell defect).

Leucism is rare but distributed across the animal kingdom. A 2021 report even documented a leucistic platypus in Australia^[15], and the Anchorage raven, a leucistic crow species, captured the public imagination as Alaska’s “White Raven.” In practice, any creature normally colored can have leucistic individuals. Scientists emphasize that these cases are not new species, just genetic variations. The costs are usually mild: a white coat might impair camouflage, or (in animals like peacocks) stand out to predators. But most leucistic animals in the wild survive, witness the repeated white-buffalo births each decade without immediate calamity.

By contrast, true albinos occur only when all melanin pigment is lost. The relatively common condition in humans (oculocutaneous albinism) is found in roughly 1 in 17,000 people of European ancestry^[16]. Leucism, in humans or any species, tends to be so recessive and scattered that whole “white races” cannot form. Piebaldism, Waardenburg syndrome and vitiligo create patches on skin or hair, but never a global white person. Thus the white tiger or lion exists; a “white human” as a distinct group does not, at least not naturally^[1][16].

Human Faces of Pigment Loss

What about people with reduced pigment? Humanity has no known leucistic tribe. Still, occasional humans display leucism-like traits. Some genetic syndromes cause patchy whiteness (piebaldism gives a white forelock and spotted skin; Waardenburg syndrome often means a white patch of hair). Vitiligo, an autoimmune loss of melanocytes, leaves mottled white skin in adults. Folklorists sometimes call these conditions “leucistic,” but medically they are distinct. Regardless, any human who looks remarkably white or patchy tends to draw attention, and often stigma.

Reports from around the world document tragic prejudice. In parts of sub-Saharan Africa, people with albinism (which shares some visual features with leucism) are tragically persecuted. Witch-doctors in Tanzania and neighboring countries kill victims to harvest their limbs or blood for charms, believing them to confer wealth or power^[17][18]. A recent UN Human Rights account chronicled “over 600 attacks” on people with albinism across 26 countries in the past decade^[17]. Victims are often children. Villagers hear that the isolated body parts of a person lacking pigment can magically cure disease or be potent money-multipliers. As one UN report bluntly states, these victims “are seen as bringing fortune and hope” despite being raped, killed, or mutilated^[18]. Elsewhere superstition turns the opposite: albino children may be deemed cursed. In some communities, a birthmark of whiteness arouses fear that the child is a “devil” or an undead spirit, sometimes leading families to abandon infants.

This suffering underscores how human color myths can be twisted. Ironically, some ideologues have spun race itself into a faux “leucistic” theory. The most famous is the late psychiatrist Frances Cress Welsing (author of The Isis Papers). She controversially claimed that “white people” are genetically albino mutants expelled from Africa by black majorities^[19][20]. In her view, Caucasians were “recessive genetic mutants,” their only survival strategy systemic racism^[19]. Welsing’s writings assert that all European genes trace to one albino offspring of a black lineage^[20]. This hypothesis has been widely debunked by genetics, yet it shows how rampant the mythology of whiteness can be.

Modern science tells a straightforward story: humans evolved light skin through normal mutation and selection, not mysticism. A 2025 review explains that as Homo sapiens migrated out of Africa 20,000,50,000 years ago, a handful of mutations happened to lighten skin. Those variants gave northerners a vitamin-D advantage in low-sunlight climates^[21]. Populations gradually became paler over millennia (just as blues and greens of fish can shift in different waters). “Race is more of a social construct than a scientific reality,” such reports emphasize^[21]. There is no secret “albino gene” hiding in Europeans; there are simply a few alleles (SLC24A5, SLC45A2, etc.) that reduce pigment moderately, basic evolutionary responses to geography.

Even more prosaic is this fact: most white-skinned humans have normal melanin-producing cells and eyes, they are no more leucistic than a white Hollywood cat is a new species. A person with vitiligo or piebaldism has a diagnosable condition, not a hidden lineage. Still, a remarkable few individuals do have extremely pale complexions that invite double-takes. The Malian singer Salif Keita, for instance, has albinism and often appears completely alabaster except for his eyes (though he is usually classified as albino). He has devoted his foundation to dispelling myths about pigment disorders.

Yet the idea of a “white family” survives in corners of culture. In the post-Soviet era, some pseudo-histories claimed Central Asian tribes called the Dokhtar-i-Nadzhib were white-skinned Indians exiled by Genghis Khan, a notion entertained by adventure writers but unsupported by genetics. In the end these stories reveal more about our fears and wishes than about science. White animals are wonderful but normal biology, and so are any white people, except that myth and racism have leapt to attach special meaning.

From Fantasy to Fear: Stories of the Pale

We have seen white animals lionized and demonized. In modern fiction, whiteness often signals otherness or purity. The vampire myth, for example, leans on the pale face: Bram Stoker’s Dracula is invariably ghostly-eyed, reflecting centuries of associating sickness and death with a drained white complexion. Folklore links blanched skin to the undead or faerie folk. The recent Netflix world-building Blood of the White Witch (2024) centers on persecuted albino children in a regime of superstition.

Hugo Lunny’s forthcoming Untenable: Our Fragile Preservation explicitly channels this vein. Its logline speaks of an immortal family, the Gheata, who are “Khaldaeons, immortal beings evolution has disguised to resemble humans.”^[3] This phrasing evokes leucism’s mystery: they look almost human but are something apart. In the story the last pale-haired vampire patriarch must “survive without sacrificing humans” when his family line is threatened^[3]. In effect, Lunny has dreamed up a “leucistic people” hiding in plain sight echoing how real leucistic animals hide among normals. The title Our Fragile Preservation and the tagline “what do you do when your family ends with you” hint at the vulnerability of such a rare lineage.

This is no coincidence. In Lunny’s universe, to be leucistic is to be immortal and endangered, a fantastic twist on how actual humans with pigment anomalies often feel. It satirizes our old impulse to make monsters of difference. The Kohlhaas-style pursuit of survival, bloodlines, and taboo-keeping in the film parallels how real societies have swung between reverence for and persecution of their white myths. If folklore cast white stags and buffaloes as moral symbols, Untenable asks what happens if the “white” itself is the secret monster among us.

In the end, Lunny’s tale reminds us that the questions his characters face; trust, exile, identity, are human ones. Leucism, whether in nature or imagination, plays out in stories because it so strikingly highlights any being’s colors. Today, genetic science has firmly answered “where did white people come from” with evolution and mutation, not magic or deep conspiracy. But as history and fiction together show, the lure of the white mystery persists. Understanding leucism biologically is one step; discarding its demon or divine narratives is another. Folklore and film may dramatize the pale anomaly, but the science is clear: leucism is rare, random, and utterly natural, not a new race or alien invasion, just biology at work in surprising disguise^[1][21].

Also, don’t forget to check out “Untenable: Our Fragile Preservation” Behind The Screenplay page for more information on the writing inspiration and process.

Broken English stuff:

The idea of immortals in fiction and religion. The Hasburg Empire and the Austro-Hungarian Empire DNA, Epigenetics and bloodlines ending… Epigenetics: The Theory and The Proof The Secret Language of Fans: Romantic Myth or Baroque Reality? Coin Clipping and Currency Fraud: The Dark Side of Medieval Money