Eddie Brock is a failed, resentful journalist, his life in pieces and a lot of pent-up rage. When an alien symbiote —a living creature that fuses with a host— joins him, Venom is born. But the symbiote isn't a suit: it's an organism that integrates into Eddie's biology and rewrites his chemistry. It amplifies his aggression, triggers a voracious appetite, ramps up his rage, lowers his brakes. Venom is the sum of two wills and two chemistries in a single body, and the behavior that results isn't entirely Eddie's nor the symbiote's, but that of the neurochemical mix. For the theory of biochemical imbalances, Brock illustrates the case of a substance —here, a living one— that installs itself in the brain and pushes behavior from within.
// The theoryAn alien chemistry in your head
The biochemical theory —the low serotonin of Virkkunen, the effect of toxins and drugs on aggression— describes how altering the brain's chemical balance modifies impulse control. Venom's symbiote is the perfect metaphor for a substance that does exactly that, but taken to the extreme of having a will of its own. It integrates into Eddie's system and changes his levels: more aggression, more impulsivity, more appetite, less inhibition. It's like a drug that, once inside, doesn't just alter the neurochemistry but actively pulls behavior toward violence. And what's interesting is that the symbiote doesn't create Eddie's rage from scratch: it amplifies the rage he already had. That nuance is key to the theory: chemistry doesn't invent a new personality, it heightens and disinhibits the one that was there —turning up the volume of existing impulses and turning down the brake—.
Amplify impulses, don't create them
Venom illustrates a subtle principle of neurochemistry: substances that alter behavior rarely implant new desires; rather they deregulate the balance between impulse and brake over raw material that was already there. The symbiote doesn't put a rage into Eddie that he didn't have —Eddie arrived full of resentment—; what it does is amplify it and strip away the inhibitors. This reflects what the theory observes in the real brain: low serotonin doesn't create aggression, it loosens the brake that held it back; alcohol doesn't invent violence, it disinhibits it; a drug doesn't manufacture a desire, it runs it wild. Venom is the dramatization of that mechanism: two chemistries —Eddie's and the symbiote's— negotiating control of a body, with the brake ever looser. And from there comes its fascinating moral ambiguity: Venom isn't pure evil, it's a runaway impulse that sometimes protects and sometimes devours, depending on which chemistry dominates. It's what happens when the balance breaks: no new demon appears, the one that already lived within is unleashed.
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// The subjectTwo wills, a single body
What makes Brock unique compared to Connors or Osborn is that his «imbalance» has a voice: the symbiote negotiates, argues, sometimes yields. That turns Venom into an extraordinarily rich metaphor for the struggle with one's own chemistry —that of the addict who dialogues with his substance, that of someone who senses «something» inside pushing them to erupt and tries to contain it—. Eddie doesn't always lose: there are moments when he tames the symbiote, when his will imposes itself over the chemistry that disinhibits him. And that is exactly what the honest theory defends: that the biochemical imbalance pushes, but doesn't entirely govern; that between the amplified impulse and the act there remains a margin of decision. Brock is responsible for what Venom does because that margin exists —however narrow it may be—. His humanity is measured precisely in the times he manages to say «no» to the chemistry he carries within.
Venom
// The crack"It was the symbiote" doesn't erase Eddie
The crack with Venom is the perfect alibi: «it wasn't me, it was the symbiote». The very structure of the character —two entities— invites dumping all the blame on the alien chemistry. But the honest theory rejects it. The symbiote amplifies and disinhibits, but it doesn't erase Eddie: the times Venom restrains himself prove that the margin of choice survives the imbalance. Biochemical factors are probabilistic —they raise the likelihood of violence, they don't impose it—, and that's why «it was my chemistry» is never a complete absolution. Eddie answers for what Venom devours, just as in the real world someone who intoxicates himself voluntarily answers for what he does while intoxicated.
The opposite crack would be to ignore that the symbiote truly changes Eddie's neurochemistry, treating him as if his behavior were identical with or without it. That also falsifies the case: the alien chemistry matters, it pushes, it loosens real brakes. The mature reading holds both things —the symbiote unbalances and Eddie is still an agent— and draws out the constructive point: that if the imbalance can be negotiated, contained or expelled (Eddie sometimes separates from the symbiote), then it is modifiable. Like all of this theory, Venom doesn't say «you're lost because of your chemistry», but «your chemistry pushes you, and learning to deal with it —or to remove it— is possible». The loose brake can be tightened again.
Living with the chemistry you carry within
Venom matters because it dramatizes the real experience of living with a neurochemistry that pushes. Millions of people deal daily with impulses amplified by their chemistry —chronic resentment, the irritability of an imbalance, the craving of an addiction, the rage disinhibited by a substance—. Venom puts a face to that struggle: the impulse has a voice, it pulls, it demands, and the person negotiates with it. The lesson of the theory, embodied in Eddie, isn't «surrender to your chemistry» nor «ignore it», but learning to recognize and contain it —and, when possible, remove the substance that unbalances it—. That Eddie sometimes manages to tame the symbiote is the heroic version of what public health seriously pursues: that the biochemical imbalance, however real, doesn't have the last word. Chemistry pushes; the response —treatment, containment, removing the toxin— is what decides whether or not the impulse becomes a crime.
Three key takeaways
- Eddie Brock merges with an alien symbiote that rewrites his neurochemistry —amplifying his rage, his aggression and his appetite, loosening the brakes— and Venom is born: an alien chemistry installed in the brain, pushing behavior.
- It illustrates a subtle principle of the theory: chemistry doesn't create new impulses, it AMPLIFIES and disinhibits them (like low serotonin or alcohol). The symbiote heightens the rage Eddie already had, not one it invented.
- The crack: "it was the symbiote" doesn't erase Eddie —the times Venom restrains himself prove the margin of decision survives the imbalance—. A probabilistic risk factor, not destiny; and since it's negotiable/expellable, it's modifiable.
Sources · further reading
- Sapolsky, R. (2017). Behave: The Biology of Humans at Our Best and Worst. Penguin.
- Virkkunen, M., et al. (1987). CSF monoamine metabolites in violent offenders. Archives of General Psychiatry.
- Heinz, A. J., et al. (2011). Cognitive and neurobiological mechanisms of alcohol-related aggression. Nature Reviews Neuroscience.
Case-file questionsFrequently asked questions
¿Quién es Venom?
Venom («Eddie Brock») es un villano de Spider-Man, analizado en KRIMINIS con la lente de la criminología. The symbiote doesn't whisper in his ear: it alters his blood.
¿Por qué Venom (Eddie Brock) se convierte en villano?
Eddie Brock merged with an alien symbiote that amplified his rage, his appetite and his aggression. Another chemistry inside his head, making decisions alongside him.
¿Qué teoría criminológica explica a Venom?
El caso de Venom se analiza desde la Desequilibrios Bioquímicos. Biochemical imbalances hold that altering brain chemistry changes behavior. Eddie Brock, from Spider-Man, merges with an alien symbiote that literally rewrites his neurochemistry —amplifying his rage, his aggression and his appetite— until it turns him into Venom. An alien chemistry installed in his brain, pushing his behavior; but Eddie is still responsible for what they do together.
