In Firefly, we are introduced to the Reavers; humans who were claimed to have reached the edge of space and went mad from seeing the endlessness of it all. Causing their entire mental state to degrade into primal rage and fury that haunts the entire star system of the Firefly setting.

However, we find out in Serenity they were the 0.1% of the population of Miranda that reacted inversely to the Pax gas agent, causing them to go insane.

How did they keep sufficient mental state to pilot starships and go on raiding parties instead of tearing each other apart? What is it about being a Reaver that makes them immune to each other's rage?

  • 3
    The same could be asked about most Zombie movies, where mindless Zombie hordes pursue single humans instead of eating each other. (Exception: Zombies that only eat braaaaains)
    – magnattic
    Feb 7, 2013 at 18:34
  • Yeah, but Zombies don't have an awesome backstory like Reavers :P
    – Tablemaker
    Feb 8, 2013 at 15:31
  • BTW, “the entire galaxy of the Firefly Universe” is just one solar system (though with many Earth-link planets and moons).
    – svick
    Feb 17, 2013 at 0:35
  • 1
    I think of them as the velociraptors in Jurassic Park: ruthless but cunning killers that work together for a common goal (so to speak). Feb 18, 2013 at 16:01
  • It's a rather big plot hole when you think about it, unless there was a detail, we the audience, are missing. If the madness was enough to make them become hyperaggressive, I don't see how they could pilot ships and raid effectively. It's like someone in the final stages of rabies doing calculus problems.
    – JCool
    May 8, 2023 at 4:43

6 Answers 6


Personal theory-

They are like a different species from humans. As other carnivorous animals, they don't eat each other. As some carnivores live in a pack they also live in a pack. They didn't even take interest in dead humans similar to some scavengers. They are anti-social and brutal but still they show some intelligence as driving ships,so they are not dumb and they have little intelligence to know who are their one kind.

They are similar to other Movie characters like were-wolves, vampires, Aliens, predators etc. who also exhibit similar characteristics.

  • 4
    I'd agree with some of it if it wasn't depicted a lot that Kaylee and Wash work together a lot to man their one ship, wheras Reavers seem to control a whole sector of space, with a lot of advancement initself.
    – Tablemaker
    Feb 6, 2013 at 19:07

Sadly, there's no explicit explanation in canon.

What Reavers do

The Reavers are shown to cooperate from the first time they are observed in-universe:

0.1% of the population of Miranda [...] acted conversely to the Pax gas agent, causing them to go insane.

The other 99.9% die by complete inactivity. All non-automated responses from Miranda cease. Alliance scientists come to investigate. The last member of this scientific exploration records the message that Serenity's crew finds on Miranda.
The message ends with a pack of Reavers busting through the door and killing the last scientist. This was a coordinated effort. The Reavers were out for this kill. They knew someone was in there. They expended effort to break in. They risked their lives in a fight.

As for

mental status to be able to pilot starships

The Reavers' scenes closest to a cooperative effort in working on ships are:

  • A booby trap on the convoy with the "survivor". This trap was set up off-screen. However this establishes that Reavers don't only use but also manipulate technology.
  • When Serenity sneaks to Miranda: Two ships pull a third apart. One could argue that Reavers scavenge ships for parts.

How to become a Reaver

It is also shown that normal people may become Reavers far from Miranda and possibly without Pax: The crew of Serenity loots a powered down convoy and finds a lone survivor who repeatedly stutters


Brought up for inspection by an Alliance cruiser, the crew is only allowed to go on, because Mal helps hunting down the "survivor", who turned into a Reaver.

Mal has something like this to say about him:

[The Reavers killed everyone onboard and] made him watch. [...] He took the only course left to him: Becoming one of them.

If Mal is right, being a Reaver is a mental state of aggression with no other option than following the group pressure of violence against weak and fleeing targets.

What Reavers don't do

Mal seems to understand the Reavers, as he repeatedly makes correct predictions about their behavior, e.g. Mal's call not to try and run when they crossed path with a slowly floating Reaver ship as to not provoke them to a hunt.

Reaver cooperation seems limited. Their ships are deranged and regularly with defunct core containment. They don't exactly care for each other or their own well-being.

Reavers don't stop. They take no cover and they don't hesitate. You can see this from the bank heist in the movie. At its end River remarks

He wouldn't stop.

This is kind of ironic, because in the end they find out that Reavers are the inhabitants of Miranda that didn't stop.

My hypothesis

Reavers extend their influence and attack other planets, because they are driven by aggression. However Reavers aren't insane as in "not able to think straight". I'd characterize them as utterly violent psychopaths. They also don't seem to be egoistic but always work towards the common goal of violence.

Maybe they are trying to get back at the Alliance without knowing whom to target specifically. Alternatively they may be trying to turn normal people into Reavers.
Notice River's pleas to the dead people on Miranda to move. Maybe aggression (which is what Pax was supposed to suppress) was the only way to keep people going and they couldn't stop afterwards.


I'm going to go out on a limb and say that Whedon wasn't able to fully explain the back story to the Reavers. Whedon originally planed on stretching the universe of Firefly over years, including a video game. If you watch Done the Impossible (a fan documentary), Whedon says the plot of the film was intended to continue from where the show left off but also be easy for non-fans to understand. In full, I don't believe there is a way to answer this question.

  • This is also a good point considering the show's fate.
    – Tablemaker
    Feb 15, 2013 at 13:12

While Wheedon provides no real answers here, nature may bring some insight into view. I would suggest the Reavers were not "insane" so much as hyper-sensitive and overly aggressive. They would probably still have a hierarchy and order to their way of life. There would still be some type of "chain-of-command" where as to keep them in order. In the movie Riddick, they "keep what they kill" - seems this might apply here as well?


It's almost like pheromones. If you don't exude a certain secretion or smell you are perceived as in this case a target. That's why they don't (assumption) attack each other. The opposite effect for zombies. The living put out a certain something that attracts the walking dead or undead as the case maybe.


Reavers are known to torture and kill their victims with bestiality:

If they take the ship, they'll rape us to death, eat our flesh, and sew our skins into their clothing. And, if we're very, very lucky, they'll do it in that order.

They also see to be either immune to physical pain, or enjoy it:

As a symptom of their insanity, they deliberately gash and cut their own flesh, and a Reaver is often covered in open or partially healed wounds

(citations after https://firefly.fandom.com/wiki/Reaver)

It would be an explanation why they don't attack each other: they enjoy the pain they inflict to the extent they don't care about dying while purchasing it (or they are unable to feel fear as well). In order to that, they need pray that is both able to feel pain and not enjoying it. Attacking other Reavers would not give them what they urge, exactly as attacking inanimate objects.

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