This is a crosspost for The Case for Insect Consciousness by Bob Fischer, which was originally published on Asterisk in January 2025.
[Subtitle.] The evidence that insects feel pain is mounting, however we approach the issue.
For years, I was on the fence about the possibility of insects feeling pain — sometimes, I defended the hypothesis;[1] more often, I argued against it.[2]
Then, in 2021, I started working on the puzzle of how to compare pain intensity across species. If a human and a pig are suffering as much as each one can, are they suffering the same amount? Or is the human’s pain worse? When my colleagues and I looked at several species, investigating both the probability of pain and its relative intensity,[3] we found something unexpected: on both scores, insects aren’t that different from many other animals.
Around the same time, I started working with an entomologist with a background in neuroscience. She helped me appreciate the weaknesses of the arguments against insect pain. (For instance, people make a big deal of stories about praying mantises mating while being eaten; they ignore how often male mantises fight fiercely to avoid being devoured.) The more I studied the science of sentience, the less confident I became about any theory that would let us rule insect sentience out.
I’m a philosopher, and philosophers pride themselves on following arguments wherever they lead. But we all have our limits, and I worry, quite sincerely, that I’ve been too willing to give insects the benefit of the doubt. I’ve been troubled by what we do to farmed animals for my entire adult life, whereas it’s hard to feel much for flies. Still, I find the argument for insect pain persuasive enough to devote a lot of my time to insect welfare research. In brief, the apparent evidence for the capacity of insects to feel pain is uncomfortably strong.[4] We could dismiss it if we had a consensus-commanding theory of sentience that explained why the apparent evidence is ir
Note that saying "this isn't my intention" doesn't prevent net negative effects of a theory of change from applying. Otherwise, doing good would be a lot easier.
I also highly recommend clarifying what exactly you're criticizing, i.e. the philosophy, the movement norms or some institutions that are core to the movement.
Finally, I usually find the criticism of people a) at the core of the movement and b) highly truth-seeking most relevant to improve the movement so I would expect that if you're trying to improve the movement, you may want to focus on these people. There exists relevant criticisms external to the movement but usually they will lack of context and thus fail to address some key trade-offs that the movement cares about.
Here's a small list of people I would be excited to hear on EA flaws and their recommandations for change:
Thank you for your comment and especially your guest recommendations! :)
I completely agree. But I still think that saying when a harm was unintentional is an important signaling mechanism. For example, if I step on your foot, saying "Sorry, that was an accident" doesn't stop you from experiencing pain but hopefully prevents us from getting into a fight. Of course it is possible for signals li... (read more)