The catastrophic rise of insect farming and its implications for future efforts to reduce suffering

On the 17th of August 2021, the EU authorized the use of insects as feed for farmed animals such as chickens and pigs. This was a disastrous decision for sentient beings, as it may greatly increase the number of beings who will suffer in animal agriculture. Sadly, this was just one in a series of disastrous decisions that the EU has made regarding insect farming in the last couple of years. Most recently, in February 2022, they authorized the farming of house crickets for human consumption, after having made similar decisions for the farming of mealworms and migratory locusts in 2021.

Many such catastrophic decisions probably lie ahead, seeing that the EU is currently reviewing applications for the farming of nine additional kinds of insects. This brief posts reviews some reflections and potential lessons in light of these harmful legislative decisions.


  1. Could we have done better?
  2. How can we do better going forward?
    1. Questioning our emotions
    2. Seeing the connection between current institutional developments and s-risks
    3. Proactively searching for other important policy areas and interventions

Could we have done better?

The most relevant aspect to reflect upon in light of these legislative decisions are the strategic implications. Could we have done better? And what could we do better going forward?

I believe the short answer to the first question is a resounding “yes”. I believe that the animal movement could have made far greater efforts to prevent this development (which is not saying much, since the movement at large does not appear to have made much of an effort to prevent this disaster). I am not saying that such efforts would have prevented this development for sure, but I believe that they would have reduced the probability and expected scale of it considerably, to such an extent that it would have been worthwhile to pursue such preventive efforts.

In concrete terms, these efforts could have included:

  • Wealthy donors such as Open Philanthropy making significant donations toward preventing the expansion of insect farming (e.g. investing in research and campaigning work).
  • Animal advocates exploring and developing the many arguments for preventing such an expansion.
  • Animal advocates disseminating these arguments to the broader public, to fellow advocates, and to influential people and groups (e.g. politicians, and policy advisors).

Important to note is that efforts of this kind not only had the potential to change a few significant policy decisions, but they could potentially have prevented — or at least reduced — a whole cascade of harmful policy decisions. Of course, having such an impact might still be possible today, even if it is a lot more difficult at this later stage where the momentum for insect farming already appears strong and growing.

As Abraham Rowe put it, “not working on insect farming over the last decade may come to be one of the largest regrets of the EAA [Effective Animal Activist] community in the near future.” 

How can we do better going forward?

When asking how we can do better, I am particularly interested in what lessons we can draw in our efforts to reduce risks of astronomical future suffering (s-risks). After all, EU’s recent decisions to allow various kinds of insect farming will not only cause enormous amounts of suffering for insects in the near future, but they arguably also increase s-risks to a non-negligible extent, such as by (somewhat) increasing the probability that insects and other small beings will be harmed on an astronomical scale in the future.

So institutional decisions like these seem relevant for our efforts to reduce s-risks, and our failure to prevent these detrimental decisions can plausibly provide relevant lessons for our priorities and strategies going forward. (An implication of these harmful developments that I will not dive into here is that they give us further reason to be pessimistic about the future.)

The following are some of the lessons that tentatively stand out to me.

Questioning our emotions

I suspect that one of the main reasons that insect farming has been neglected by animal advocates is that it fails to appeal to our emotions. A number of factors plausibly contribute to this low level of emotional appeal. For instance, certain biases may prevent proper moral consideration for insects in general, and scope insensitivity may prevent us from appreciating the large number of insects who will suffer due to insect farming. (I strongly doubt that anyone is exempt from these biases, and I suspect that even people who are aware of them might still have neglected insect farming partly as a consequence of these biases.)

Additionally, we may have a bias to focus too narrowly on the suffering that is currently taking place rather than (also) looking ahead to consider how new harmful practices and sources of suffering might emerge, potentially on far greater scales than what we currently see. Reducing the risk of such novel atrocities occurring on a vast scale might not feel as important as does the reduction of existing forms of suffering. Yet the recent rise of insect farming, and the fact that we likely could have done effective work to prevent it, suggest that such feelings are not reliable.

Seeing the connection between current institutional developments and s-risks

When thinking about s-risks, it can be easy to fall victim to excessively abstract thinking and (what I have called) “long-term nebulousness bias” — i.e. a tendency to overlook concrete data and opportunities relevant to long-term influence. In particular, the abstract nature of s-risks may lead us to tacitly believe that good opportunities to influence policy (relative to s-risk reduction) can only be found well into the future, and to perhaps even assume that there is not much of significance that we can do to reduce s-risks at the policy level today

Yet I think the case of insect farming is a counterexample to such beliefs. To be clear, I am not saying that insect farming is necessarily the most promising policy area that we can focus on with respect to s-risk reduction. But it is plausibly a significant one, and one that those trying to reduce s-risks should arguably have paid more attention to in the past. And it still appears to merit greater focus today.

Proactively searching for other important policy areas and interventions

As hinted above, the catastrophic rise of insect farming is in some sense a proof of concept that there are policy decisions in the making that plausibly have a meaningful impact on s-risks. More than that, the case of insect farming might be an example where policy decisions in our time could be fairly pivotal — whether we see a ban on insect farming versus a rapidly unfolding cascade of policy decisions that swiftly expand insect farming might make a big difference, not least because such a cascade could leave us in a position where there is more institutional, financial, and value-related momentum in favor of insect farming (e.g. if massive industries with lobby influence have already emerged around it, and if most people already consider farmed insects an important part of their diet).

This suggests a critical lesson: those working to reduce s-risks have good reason to search for similar, potentially even more influential policy decisions that are being made today or in the near future. By analogy to how animal advocates likely could have made a significant difference (in expectation) if they had campaigned against the expansion of insect farming over the last decade, we may now do well by looking decades ahead, and considering which pivotal policy decisions that we might now be in a good position to influence. The need for such a proactive search effort could be the most important takeaway in light of this recent string of disastrous decisions.

Reasons to include insects in animal advocacy

I have seen some people claim that animal activists should primarily be concerned with certain groups of numerous vertebrates, such as chickens and fish, whereas we should not be concerned much, if at all, with insects and other small invertebrates. (See e.g. here.) I think there are indeed good arguments in favor of emphasizing chickens and fish in animal advocacy, yet I think those same arguments tend to support a strong emphasis on helping insects as well. My aim in this post is to argue that we have compelling reasons to include insects and other small vertebrates in animal advocacy.


  1. A simplistic sequence argument: Smaller beings in increasingly large numbers
    1. The sequence
    2. Why stop at chickens or fish?
  2. Invertebrate vs. vertebrate nervous systems
    1. Phylogenetic distance
    2. Behavioral and neurological evidence
    3. Nematodes and extended sequences
  3. Objection based on appalling treatment
  4. Potential biases
    1. Inconvenience bias
    2. Smallness bias
    3. Disgust and fear reflexes
    4. Momentum/status quo bias
  5. Other reasons to focus more on small invertebrates
    1. Neglectedness
    2. Opening people’s eyes to the extent of suffering and harmful decisions
    3. Risks of spreading invertebrates to space: Beings at uniquely high risk of suffering due to human space expansion
    4. Qualifications and counter-considerations
  6. My own view on strategy in brief
  7. Final clarification: Numbers-based arguments need not assume that large amounts of mild suffering can be worse than extreme suffering
  8. Acknowledgments

A simplistic sequence argument: Smaller beings in increasingly large numbers

As a preliminary motivation for the discussion, it may be helpful to consider the sequence below.

I should first of all clarify what I am not claiming in light of the following sequence. I am not making any claims about the moral relevance of the neuron counts of individual beings or groups of beings (that is a complicated issue that defies simple answers). Nor am I claiming that we should focus mostly on helping beings such as land arthropods and nematodes. The claim I want to advance is a much weaker one, namely that, in light of the sequence below, it is hardly obvious that we should focus mostly on helping chickens or fish.

The sequence

At any given time, there are roughly:

  • 780 million farmed pigs, with an estimated average neuron count of 2.2 billion. Total neuron count: ~1.7 * 10^18.
  • 33 billion farmed chickens, with an estimated average neuron count of 200 million. Total neuron count: ~6.6 * 10^18.
  • 10^15 fish (the vast majority of whom are wild fish), with an estimated average neuron count of 1 million neurons (this number lies between the estimated neuron count of a larval zebrafish and an adult zebrafish; note that there is great uncertainty in all these estimates). Total neuron count: ~10^21. It is estimated that humanity kills more than a trillion fish a year, and if we assume that they likewise have an average neuron count of around 1 million neurons, the total neuron count of these beings is ~10^18.
  • 10^19 land arthropods, with an estimated average neuron count of 15,000 neurons (some insects have brains with more than a million neurons, but most arthropods appear to have considerably fewer neurons). Total neuron count: ~1.5*10^23. If humanity kills roughly the same proportion of land arthropods as the proportion of fish that we kill (e.g. through insecticides and insect farming), then the total neuron count of the land arthropods we kill is ~10^20.
  • 10^21 nematodes, with an estimated average neuron count of 300 neurons. Total neuron count: ~3 * 10^23.

Why stop at chickens or fish?

The main argument that supports a strong emphasis on chickens or fish is presumably their large numbers (as well as their poor treatment, which I discuss below). Yet the numbers-based argument that supports a strong emphasis on chickens and fish could potentially also support a strong emphasis on small invertebrates such as insects. It is thus not clear why we should place a strict boundary right below chickens or fish beyond which this numbers-based argument no longer applies. After all, each step of this sequence entails a similar pattern in terms of crude numbers: we have individual beings who on average have 1-3 orders of magnitude fewer neurons yet who are 1-5 orders of magnitude more numerous than the beings in the previous step.

Invertebrate vs. vertebrate nervous systems

A defense that one could give in favor of placing a relatively strict boundary below fish is that we here go from vertebrates to invertebrates, and we can be significantly less sure that invertebrates suffer compared to vertebrates.

Perhaps this defense has some force. But how much? Our confidence that the beings in this sequence have the capacity to suffer should arguably decrease at least somewhat in each successive step, yet should the decrease in confidence from fish to insects really be that much bigger than in the previous steps?

Phylogenetic distance

Based on the knowledge that we ourselves can suffer, one might think that a group of beings’ phylogenetic distance from us (i.e. how distantly related they are to us) can provide a tentative prior as to whether those beings can suffer, and regarding how big a jump in confidence we should make for different kinds of beings. Yet phylogenetic distance per se arguably does not support a substantially greater decrease in confidence in the step from fish to insects compared to the previous steps in the sequence above. 

The last common ancestor of humans and insects appears to have lived around 575 million years ago, whereas the last common ancestor of humans and fish lived around 400-485 million years ago (depending on the species of fish; around 420-460 million years for the most numerous fish). By comparison, the last common ancestor of humans and chickens lived around 300 million years ago, while the last common ancestor of humans and pigs lived around 100-125 million years ago.

Thus, when we look at different beings’ phylogenetic distance from humans in these temporal terms, it does not seem that the step between fish and insects (in the sequence above) is much larger than the step between fish and chickens or between chickens and pigs. In each case, the increase in the “distance” appears to be something like 100-200 million years.

Behavioral and neurological evidence

Of course, “phylogenetic distance from humans” does not represent strong evidence as to whether a group of beings has the capacity to suffer. After all, humans are more closely related to starfish (~100 neurons) than to octopuses (~500 million neurons), and we have much stronger reasons to think that the latter can suffer, based on behavioral and neurological evidence (cf. the Cambridge Declaration on Consciousness).

Does such behavioral and neurological evidence support a uniquely sharp drop in confidence regarding insect sentience compared to fish sentience? Arguably not, as there is mounting evidence of pain in (small) invertebrates, both in terms of behavioral and neuroscientific evidence. Additionally, there are various commonalities in the respective structures and developments of arthropod and vertebrate brains.

In light of this evidence, it seems that a sharp drop in confidence regarding pain in insects (versus pain in fish) requires a justification.

Nematodes and extended sequences

I believe that a stronger decrease in confidence is warranted when comparing arthropods and nematodes, for a variety of reasons: the nematode nervous system consists primarily of a so-called nerve ring, which is quite distinct from the brains of arthropods, and unlike the neurons of arthropods (and other animals), nematode neurons do not have action potentials or orthologs of sodium-channels (e.g. Nav1 and Nav2), which appear to play critical roles to pain signaling in other animals.

However, the evidence of pain in nematodes should not be understated either. The probability of pain in nematodes still seems non-negligible, and it arguably justifies substantial concern for (the risk of) nematode pain, even if it does not overall warrant a similarly strong concern and priority as does the suffering of chickens, fish, and arthropods.

This discussion also hints at why the sequence argument above need not imply that we should primarily focus on risks of suffering in bacteria or atoms, as one may reasonably hold that the probability of such suffering decreases by a greater rate than the number of the purported sufferers increases in such extended sequences.

Objection based on appalling treatment

Another reason one could give in favor of focusing on chickens and fish is that they are treated in particularly appalling ways, e.g. they are often crammed in extremely small spaces and killed in horrific ways. I agree that humanity’s abhorrent treatment of chickens and fish is a strong additional reason to prioritize helping them. Yet it seems that this same argument also favors a focus on insects.

After all, humanity poisons vast numbers of insects with insecticides that may cause intensely painful deaths, and in various insect farming practices — which are sadly growing — insects are commonly boiled, fried, or roasted alive. These practices seem no less cruel and appalling than the ways in which we treat and kill chickens and fish.

Potential biases

There are many reasons to expect that we are biased against giving adequate moral consideration to small invertebrates such as insects (in addition to our general speciesist bias). The four plausible biases listed below are by no means exhaustive.

Inconvenience bias

It is highly inconvenient if insects can feel pain, as it would imply that 1) we should be concerned about far more beings, which greatly complicates our ethical and strategic considerations (compared to if we just focused on vertebrates); 2) the extent of pain and suffering in the world is far greater than we would otherwise have thought, which may be a painful conclusion to accept; and 3) we should take far greater care not to harm insects in our everyday lives. All these inconveniences likely motivate us to conclude that insects are not sentient or that they are not that important in the bigger picture.

Smallness bias

Insects tend to be rather small, even compared to fish, which might make us reluctant to grant them moral consideration. In other words, our intuitions plausibly display a general sizeist bias. As a case in point, ants have more than twice as many neurons as lobsters, and there does not seem to be any clear reason to think that ants are less able to feel pain than are lobsters. Yet ants are obviously much smaller than lobsters, which may explain why people seem to show considerably more concern for lobsters than for ants, and why the number of people who believe that lobsters can feel pain (more than 80 percent in a UK survey) is significantly larger than the number of people who believe that ants can feel pain (around 56 percent). Of course, this pattern may also be partially explained by the inconvenience bias, since the acceptance of pain in lobsters seems less inconvenient than does the acceptance of pain in ants; but size likely still plays a significant role. (See also Vinding, 2015, “A Short Note on Insects”.)

Disgust and fear reflexes

It seems that many people have strong disgust reactions to (at least many) small invertebrates, such as cockroaches, maggots, and spiders. Some people may also feel fear toward these animals, or at least feel that they are nuisance. Gut reactions of this kind may well influence our moral evaluations of small invertebrates in general, even though they ideally should not.

Momentum/status quo bias

The animal movement has not historically focused on invertebrates, and hence there is little momentum in favor of focusing on their plight. That is, our status quo bias seems to favor a focus on helping the vertebrates whom the animal movement have traditionally focused on. To be sure, status quo bias also works against concern for fish and chickens to some degree (which is worth controlling for as well), yet chickens and fish have still received considerably more focus from the animal movement, and hence status quo bias likely negates concern for insects to an even stronger extent.

These biases should give us pause when we are tempted to reflexively dismiss the suffering of small invertebrates.

Other reasons to focus more on small invertebrates

In addition to the large number of arthropods and the evidence for arthropod pain, what other reasons might support a greater focus on small invertebrates?


An obvious reason is the neglect of these beings. As hinted in the previous section, a focus on helping small invertebrates has little historical momentum, and it is still extremely neglected in the broader animal movement today. This seems to me a fairly strong reason to focus more on invertebrates on the margin, or at the very least to firmly include invertebrates in one’s advocacy.

Opening people’s eyes to the extent of suffering and harmful decisions

Another, perhaps less obvious reason is that concern for smaller beings such as insects might help reduce risks of astronomical suffering. This claim should immediately raise some concerns about suspicious convergence, and as I have argued elsewhere, there is indeed a real risk that expanding the moral circle could increase rather than reduce future suffering. Partly for this reason, it might be better to promote a deeper concern for suffering than to promote wider moral circles (see also Vinding, 2020, ch. 12).

Yet that being said, I also think there is a sense in which wider moral circles can help promote a deeper concern for suffering, and not least give people a more realistic picture of the extent of suffering in the world. Simply put, a moral outlook that includes other vertebrates besides humans will see far more severe suffering and struggle in the world, and a perspective that also includes invertebrates will see even more suffering still. Indeed, not only does such an outlook open one’s eyes to more existing suffering, but it may also open one’s eyes (more fully) to humanity’s capacity to ignore suffering and to make decisions that actively increase it, even today.

Risks of spreading invertebrates to space: Beings at uniquely high risk of suffering due to human space expansion

Another way in which greater concern for invertebrate suffering might reduce risks of astronomical suffering is that small invertebrates seem to be among the animals who are most likely to be sent into space on a large scale in the future (e.g. because they may survive better in extreme environments). Indeed some invertebrates — including fruit flies, crickets, and wasps — have already been sent into space, and some tardigrades were even sent to the moon (though the spacecraft crashed and probably none survived). Hence, the risk of spreading animals to space plausibly gives us additional reason to include insects in animal advocacy.

Qualifications and counter-considerations

To be clear, the considerations reviewed above merely push toward increasing the emphasis that we place on small beings such as insects — they are not necessarily decisive reasons to give primary focus to those beings. In particular, these arguments do not make a case for focusing on helping insects over, say, new kinds of beings who might be created in the future in even larger numbers.

It is also worth noting that there may be countervailing reasons not to emphasize insects more. One is that it could risk turning people away from the plight of non-human animals and the horror of suffering, which many people might find difficult to relate to if insect suffering constitutes the main focus at a practical level. This may be a reason to favor a greater focus on the suffering of larger and (for most people) more relatable animals.

I think the considerations on both sides need to be taken into account, including considerations about future beings who may become even more numerous and more neglected than insects. The upshot, to my mind, is that while focusing primarily on helping insects is probably not the best way to reduce suffering (for most of us), it still seems likely that 1) promoting greater concern for insects, as well as 2) promoting concrete policies that help insects, both constitute a significant part of the optimal portfolio of aims to push for.

My own view on strategy in brief

While questions about which beings seem most worth helping (on the margin) can be highly relevant for many of our decisions, there are also many strategic decisions that do not depend critically on how we answer these questions.

Indeed, my own view on strategies for reducing animal suffering is that we generally do best by pursuing robust and broad strategies that help many beings simultaneously, without focusing too narrowly on any single group of beings. (Though as hinted above, I think there are many situations where it makes sense to focus on interventions that help specific groups of beings.)

This is one of the reasons why I tend to favor an antispeciesist approach to animal advocacy, with a particular emphasis on the importance of suffering. Such an approach is still compatible with highlighting the scale and neglectedness of the suffering of chickens, fish, and insects, as well as the scale and neglectedness of wild-animal suffering. That is, a general approach thoroughly “scope-informed” about the realities on the ground.

And such a comprehensive approach seems further supported when we consider risks of astronomical suffering (despite the potential drawbacks alluded to earlier). In particular, when trying to help other animals today, it is worth asking how our efforts might be able to help future beings as well, since failing to do so could be a lost opportunity to spare large numbers of beings from suffering. (For elaboration, see “How the animal movement could do even more good” and Vinding, 2022, sec. 10.8-10.9.)

Final clarification: Numbers-based arguments need not assume that large amounts of mild suffering can be worse than extreme suffering

An objection against numbers-based arguments for focusing more on insects is that small pains, or a high probability of small pains, cannot be aggregated to be worse than extreme suffering.

I agree with the view that small pains do not add up to be worse than extreme suffering, yet I think it is mistaken to think that this view undermines any numbers-based argument for emphasizing insects more in animal advocacy. The reason, in short, is that we should also assign some non-negligible probability to the possibility that insects experience extreme suffering (e.g. in light of the evidence for pain in insects cited above). And this probability, combined with the very large number of insects, implies that there are many instances of extreme suffering occurring among insects in expectation. After all, the vast number of insects should lead us to believe that there are many beings who have experiences at the (expected) tail-end of the very worst experiences that insects can have.

As a concluding thought experiment that may challenge comfortable notions regarding the impossibility of intense pain among insects, consider that you were given the choice between A) living as a chicken inside a tiny battery cage for a full day, or B) being continually born and reborn as an insect who has the experience of being burned or crushed alive, for a total of a million days (for concreteness, you may imagine that you will be reborn as a butterfly like the one pictured at the top of this post).

If we were really given this choice, I doubt that we would consider it an easy choice in favor of B. I doubt that we would dismiss the seriousness of the worst insect suffering.


For their helpful comments, I am grateful to Tobias Baumann, Simon Knutsson, and Winston Oswald-Drummond.

On Insects and Lexicality

“Their experiences may be more simple than ours, but are they less intense? Perhaps a caterpillar’s primitive pain when squashed is greater than our more sophisticated sufferings.”

— Richard Ryder, Painism: A Modern Morality, p. 64.

Many people, myself included, find it plausible that suffering of a certain intensity, such as torture, carries greater moral significance than any amount of mild suffering. One may be tempted to think that views of this kind imply we should primarily prioritize the beings most likely to experience these “lexically worse” states of suffering (LWS) — presumably beings with large brains.* By extension, one may think such views will generally imply little priority to beings with small, less complex brains, such as insects. (Which is probably also a view we would intuitively like to embrace, given the inconvenience of the alternative.) 

Yet while perhaps intuitive, I do not think this conclusion follows. The main argument against it, in my view, is that we should maintain a non-trivial probability that beings with small brains, such as insects, indeed can experience LWS (regardless of how we define these states). After all, on what grounds can we confidently maintain they cannot?

And if we then assume an expected value framework, and multiply the large number of insects by a non-trivial probability of them being able to experience LWS, we find that, in terms of presently existing beings, the largest amount of LWS in expectation may well be found in small beings such as insects.

* It should be noted in this context, though, that many humans ostensibly cannot feel (at least physical) pain, whereas many beings with smaller brains show every sign of having this capacity, which suggests brain size is a poor proxy for the ability to experience pain, let alone the ability to experience LWS, and that genetic variation in certain pain-modulating genes may well be a more important factor.

More literature

On insects:

The Importance of Insect Suffering
Reducing Suffering Amongst Invertebrates Such As Insects
Do Bugs Feel Pain?
How to Avoid Hurting Insects
The Moral Importance of Invertebrates Such as Insects

On Lexicality:

Value Lexicality
Clarifying lexical thresholds
Many-valued logic as a reply to sequence arguments in value theory
Lexicality between mild discomfort and unbearable suffering: A variety of possible views
Lexical priority to extreme suffering — in practice

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