The premise of Brightburn (2019) is diabolically simple: take the Superman story —a ship falling from the sky, a baby, kindly farmers who adopt and raise him with love— and change the ending. Brandon Breyer does not become a hero. As he reaches puberty, he "awakens" to his alien nature and decides, just like that, to take the world. His parents did everything right and it made no difference. The film is the nature vs nurture experiment in its most terrifying form: what if upbringing, however perfect, were not enough?
// The theoryThe adoption experiment
Without knowing it, Brightburn reproduces the design of the adoption studies, the flagship tool of behavioral genetics. The logic is the same: separate the parents who provide the genes (here, unknown aliens) from those who provide the home (the Breyers). If the adoptee resembles their biological origin more than their upbringing, heredity matters. In Mednick's Danish cohort (1984), the criminality of adoptees did indeed lean toward their biological parents.
Brandon is that correlation taken to the absolute: biology does not just matter, it steamrolls. The Breyers' loving upbringing is completely powerless against the "program" he carried inside. And there lies the film's trap —fascinating as horror, false as science—: it turns a partial influence into a total destiny. The real studies say heredity tips the scale; Brightburn says the factory part decides everything. Those are very different things.
Nature does not "win": it converses
Brandon's error is treating nature and nurture as a fight with one winner. Modern behavioral genetics sees them as a conversation: the gene × environment interaction. Not even in adoption does biology "win" alone —the adoptive home also shapes the outcome, and the correlation with the biological parents is real but partial—. The film itself slips in a trigger: Brandon does not awaken at birth, but at puberty, activated by a signal from his ship. Even the most "factory-made" monster needs a switch to turn it on. Nature does not defeat nurture; it switches on, or not, within it.
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// The subjectThe chosen one who believes he is superior
Beneath the science-fiction skin, Brandon is a very recognizable profile: the one who convinces himself he belongs to a superior category, exempt from the rules that bind everyone else. "I am superior" is not a biological fact; it is a narrative —the same grandiosity that sustains so many villains in the archive, from the dark triad to the idealist who believes himself beyond good and evil—. The film suggests that his power causes his evil, but what truly unleashes him is that story he tells himself: that being different places him above guilt. Power amplifies; it does not create the choice to use it that way.
Brandon Breyer
// The flaw"Some are born superior": the darkest echo
The flaw in Brightburn is the most dangerous in the theory: the idea that there exist innately superior or irredeemable beings, different in their essence. Stripped of superpowers, that is the fantasy that fed eugenics —classifying humans by their "material" and acting accordingly—. When a story asserts that someone's nature makes them untouchable by education, love or law, it is one step from asserting that certain people are surplus. Science denies it: there are no "superiors" nor sealed "seeds", only predispositions that life switches on or off.
And the fatalistic reading has a practical cost. If we believe that upbringing "is not enough", we stop investing in the one thing the evidence supports: environments. Brightburn is entertainment that plays on our fear that effort is useless; real behavioral genetics says the opposite —that the environment is, almost always, the variable we can actually play with—. Explaining why a child "of difficult origin" ends up badly does not require surrender; it demands looking at the trigger that could have been switched off.
Not surrendering to "nature"
Brandon matters as a warning against genetic fatalism. If the message we take away is "some people are born lost and there is nothing to be done", we will make exactly the worst decisions: abandoning instead of intervening, punishing instead of preventing. The honest conclusion of the theory is the opposite and more demanding one: neither the best home guarantees a hero, nor the worst inheritance condemns to a monster. Between nature and nurture there is no winner; there is a margin —and that margin is where the work happens—.
Brightburn frightens because it whispers that whatever we do makes no difference: nature will win. It is a great horror film and a terrible theory of crime. Science has spent a century showing that no one's "program" is that closed —and that surrendering to it is the only prophecy that does fulfill itself—.
Three key takeaways
- Brightburn reproduces the design of adoption studies, but turns a partial influence of biology into a total destiny: "nature always wins". Science says heredity tips the scale, it does not decide it.
- Nature and nurture do not compete: they converse (gene × environment). Even the "factory-made" monster needs a trigger —Brandon awakens at puberty, not at birth—.
- The idea of "innately superior or lost" beings is the echo of eugenics and a practical trap: it leads to abandoning instead of intervening. Neither the best home guarantees a hero, nor the worst inheritance condemns.
Sources · further reading
- Mednick, S. A., Gabrielli, W. F. & Hutchings, B. (1984). «Genetic Influences in Criminal Convictions: Evidence from an Adoption Cohort». Science, 224.
- Caspi, A. y cols. (2002). «Role of Genotype in the Cycle of Violence in Maltreated Children». Science, 297.
- Raine, A. (2013). The Anatomy of Violence. Pantheon.
- Gould, S. J. (1981). La falsa medida del hombre. W. W. Norton.
Case-file questionsFrequently asked questions
¿Quién es Brandon Breyer?
Brandon Breyer («Brightburn») es un villano de Brightburn, analizado en KRIMINIS con la lente de la criminología. Good parents, a good home, all the love in the world.
¿Por qué Brandon Breyer (Brightburn) se convierte en villano?
Brightburn and behavioral genetics: a child raised with love by model parents… who becomes a monster anyway. The fantasy that nature always wins —and why science disproves it—.
¿Qué teoría criminológica explica a Brandon Breyer?
El caso de Brandon Breyer se analiza desde la Genética conductual. Brightburn inverts Superman: an alien child raised by loving parents who, instead of a hero, becomes a predator. It is the nature-vs-nurture experiment in its most deterministic form —perfect upbringing defeated by "nature"—. It works as a mirror of adoption studies (where biology matters, but is not everything) and as a warning against their fatalistic reading: in real science, neither the best environment guarantees goodness, nor the worst inheritance seals fate.
