[I haven't read anyone else's entries before posting this.]
My (truthful) general position: I am not vegetarian. I do think non-human animals' welfare matters. I suspect that I "should" be vegetarian in something like the sense in which I "should" give 90% of my income to charities.
Omnivore questions:
I think most Americans eat more meat than is optimal for their health, and I acknowledge that meat production is much less efficient in calories/dollar (or calories per litre of water, or by many other measures) than plant-food production. These facts are not necessarily even strong arguments for eating less meat (we often do things that are suboptimal by one criterion because there's something else we also care about), let alone outright vegetarianism.
I think much factory farming is cruel and we would probably be better off without it. There's much reason to think that happier animals' meat tastes better, too. I am happy to pay more for less cruelly produced meat. I probably would be happy to pay twice as much if (1) I had good reason to think that the cheap option really involved a lot of suffering for the animals and (2) I had good reason to think that the expensive option involved much less. I don't think any of this has much to do with being "more natural", nor with "factory farming" as such; if someone has a way of raising animals less cruelly but still in large numbers and using modern technology, that's as good morally as one that only works for small numbers and that works more traditionally. (Though maybe the latter would produce tastier meat...)
I can't see it ever being appropriate to farm chimpanzees, for instance. This is a matter of degree rather than a sharp dichotomy; eating animals always involves some tradeoff between the animals' interests and our own; if there's a boundary then I suppose it comes at a point where there's no possible way for the animals' meat to be so much tastier than alternatives as to justify farming and eating them. I bet that's true for chimps; it probably is for other primates; probably for whales and dolphins, too; but I don't have any very quantitative way of drawing the line.
If almost everyone were vegetarian, then I expect I would be vegetarian too.
Vegetarian questions:
I'd be absolutely OK with it in principle, but in practice I think I wouldn't want to eat it. I've got used to not eating meat, and the idea of eating anything meat-like just feels icky to me now.
No, I wouldn't disagree. But why should I care what's "natural"? It's natural to have a 50% chance (or whatever the right figure is) of dying in infancy. It's natural to fear anyone who looks too different from yourself. Antibiotics, telephones and charity are unnatural. Why should I do something I think is wrong just because chimpanzees do it and my long-dead ancestors did it? The final nail in the coffin of this argument is that vegetarians in fact appear to be healthier than meat-eaters. I don't think the idea that I should do something that's against my values and bad for my health because it's "natural" is credible.
It's my business what other people eat to about the same extent as it's my business who other people kill. I'm not, as it happens, the proselytizing sort, so I have made very little attempt to convince anyone else to stop eating meat. But I see no reason why I (or any other vegetarian) shouldn't.
I'm not vegetarian for the sake of my health (though that seems to be a nice side benefit) and haven't paid much attention to research on this. My understanding, which may be years out of date, is that vegetarians are less likely to be overweight and tend to have better cardiovascular health. (The health risk associated with meat-eating that I personally find most salient is parasites -- but that's just because parasites happen to freak me out, which isn't much justification for anything.)
I'm running an Ideological Turing Test (or Caplan Test) in my local rationality group on the topic of vegetarianism. (Based on a survey, it's one that splits my community pretty evenly.) If anyone here is interested, you're welcome to participate! I'll be posting the responses I get on LW for judging, and I'm hoping to get responses from a couple people here that I could use for my local group. After I get responses and the community judges them, I'll post here to share the statistics.
You can PM me or rot13 your entry if you're concerned about information leakage, but I'll also accept plaintext comments. The (soft) deadline for submission is the evening of the 15th. If I don't have enough responses by then (for LW or my local group) I'll extend it.
If you're interested in participating, please read on:
First, please write a paragraph or two about what your general position is on vegetarianism. Please make it clear which way you lean for the purposes of answering/judging. This text will be public knowledge (used for the reveal) so include your name if you want to be known, and keep it anonymous if you don't.
Once you've described yourself, please write a paragraph (or two) to briefly answer each of the following questions. If you do not identify as an omnivore, answer the omnivore questions by pretending to be an (aspiring rationalist) omnivore. If you are not a vegetarian, answer the vegetarian questions by pretending to be an (aspiring rationality) vegetarian. When writing responses to the prompts, do not include information that makes it clear who you are (for example: I shouldn't say "Because I am very tall....")
For Omnivores:
* Do you think the level of meat consumption in America is healthy for individuals? Do you think it's healthy for the planet?
* How do you feel about factory farming? Would you pay twice as much money for meat raised in a less efficient (but "more natural") way?
* Are there any animals you would (without significantly changing your mind) never say it was okay to hunt/farm and eat? If so, what distinguishes these animals from the animals which are currently being hunted/farmed?
* If all your friends were vegetarians, and you had to go out of your way to find meat in a similar way to how vegans must go out of their way right now, do you think you'd still be an omnivore?
For Vegetarians:
* If there was a way to grow meat in a lab that was indistinguishable from normal meat, and the lab-meat had never been connected to a brain, do you expect you would eat it? Why/why not?
* Indigenous hunter gatherers across the world get around 30 percent of their annual calories from meat. Chimpanzees, our closest non-human relatives, eat meat. There are arguments that humans evolved to eat meat and that it's natural to do so. Would you disagree? Elaborate.
* Do you think it's any of your business what other people eat? Have you ever tried (more than just suggesting it or leading by example) to get someone to become a vegetarian or vegan?
* What do you think is the primary health risk of eating meat (if any)?