While many people in the effective altruism movement are vegan, I'm not, and I wanted to write some about why. The short answer is what while I'm on board with the general idea of making sacrifices to help others I think veganism doesn't represent a very good tradeoff, and I think we should put our altruistic efforts elsewhere.
There are many reasons people decide to eat vegan food, from ethics to taste to health, and I'm just interested in the ethical perspective. As a consequentialist, the way I see this is, how would the world be different if I stopped eating animals and animal products?
One factor is that I wouldn't be buying animal products anymore, which would reduce the demand for animals, and correspondingly the amount supplied. Elasticity means that if I decrease by buying by one unit I expect production to fall by less than one unit, but I'm going to ignore that here to be on the safe side. Peter Hurford gives a very rough set of numbers for how many continuously living animals are required to support a standard American diet and gets:
- 1/8 of a cow
- 1/8 of a pig
- 3 chickens
- 3 fish
Now, I don't think animals matter as much as humans. I think there's a very large chance they don't matter at all, and that there's just no one inside to suffer, but to be safe I'll assume they do. If animals do matter, I think they still matter substantially less than humans, so if we're going to compare our altruistic options we need a rough exchange rate between animal and human experience. Conditional on animals mattering, averting how many animal-years on a factory farm do I see as being about as good as giving a human another year of life?
- Pigs: about 100. Conditions for pigs are very bad, though I still think humans matter a lot more.
- Chickens: about 1,000. They probably matter much less than pigs.
- Cows: about 10,000. They probably matter about the same as pigs, but their conditions are far better.
- Fish: about 100,000. They matter much less than chickens.
Overall this has, to my own personal best guess, giving a person another year of life being more valuable than at least 230 Americans going vegan for a year.
The last time I wrote about this I used $100 as how much it costs to give someone an extra year of life through a donation to GiveWell's top charities, and while I haven't looked into it again that still seems about right. I think it's likely that you can do much better than this through donations aimed at reducing the risk of human extinction, but is a good figure for comparison. This means I'd rather see someone donate $43 to GiveWell's top charities than see 100 people go vegan for a year.
Since I get much more than $0.43 of enjoyment out of a year's worth of eating animal products, veganism looks like a really bad altruistic tradeoff to me.
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I agree with this.
I don't think the majority of EAs value our own "enjoyment >50x more than that of an arbitrary human" after reflection. I think most of us actually have impartial views, but don't think it would be sustainable/productive or can't find the willpower or motivation to be so ascetic.
For discussions among engaged EAs, I think we should be clear about what's going on here. Maybe for the donation pledges, we can use this kind of phrasing, although we wouldn't be representing our own views accurately. There's a lot of discussion about mental health, burnout and taking care of yourself in the EA community which serves this purpose for us.
Also, the same kind of argument could be used for being mean to people (anonymously) if you enjoyed it, because their harm seems insignificant compared to saving a year of human life, and you'd be willing to pay a bit to be mean every now and then.
You might respond that you can find things you'd enjoy just as much as being mean, and you should do those instead. I feel the same about animal products vs vegan meals. They don't have to be similar substitutes, and this is likely to disappoint many. I might be unusually indifferent between foods, though, which has made being vegan pretty easy for me, and Jeff eats a lot of vegan food, and still thinks the difference is important enough.