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.
Comment via: facebook
One kind of reason to do both: It's not a true tradeoff.
It's easy to spend a lot of money on top-of-the-line vegan cheeses and meats. But it's also quite feasible to meet most people's dietary requirements with vegan foods that cost just as much as, or even less than, animal-based foods. (Shout out to my boi rice-and-beans.)
In that case, we're not trading off dollars for dollars. We're trading off time, effort, and comfort for dollars.
At some point, if you spend enough time on something, it might cut into your earning potential. But many of us have jobs that only allow us to work a certain number of hours per week anyway, or minds that only allow us to be focused and productive for a certain number of hours per week. For these people, it's possible to spend additional time and effort without cutting into earning potential.
So the question is not "Can I do more good than veganism with my money?" but rather "Can I do more good than veganism with my time?" Not a lot of other volunteer opportunities give you the chance to spare multiple individuals from torture every year, so I think it's likely still a good use of time.
(Though this obviously intersects with the other question of "Just how morally valuable is it to spare animals from factory farming?")