A few other thoughts I've written to various people lately that I thought I might as well throw into a blog post, which will be rather disorganized. This next comment is addressed to what strikes me as the incredibly silly, shallow argument that likens animal-product consumption to eating the brains of puppies deliberately bred in a horribly painful way to make them tasty. (Yes, there really is such an "argument" out there.) Or, in general, the "argument" that implies that we eat meat and/or animal products only out of lazy hedonism.
I want also to say quite openly that I would actually oppose even the voluntary cessation of all that is called "factory farming," because I consider the efficient production of large quantities of meat, dairy, eggs, etc., to be quite important to human nutrition given the population of both the developed world and the world as a whole. Animal products are not a luxury eaten by hedonistic, morally oblivious gluttons. They are an important part of a natural, omnivorous human diet that efficiently delivers necessary nutrients in a form likely actually to be eaten by large numbers of human beings. It is therefore important for them to be produced in such a quantity that these products are readily available and affordable.A few more words about that: The idea that there is something low and unworthy about eating food that tastes good has a certain almost unhealthy asceticism about it, as though morally perfect beings would get all their nutrition in some tasteless, unenjoyable fashion or would eat only out of duty. The good taste of animal products, and their high concentrations of important nutrients such as protein, iron, and the essential B12 (which, no, is not found in seaweed!) come together to make it relatively easy for an omnivore to eat a diet containing enough of these nutrients. That's actually important to human flourishing. If you have to get absolutely essential nutrients by taking supplements (and vegans, especially, do have to obtain supplements or specially fortified food for their B12), then your diet is insufficiently nutritious and varied. You can do that if you choose, but there is no moral requirement for people in general to do that, and indeed it is unlikely that mankind as a whole is going to get the diet it needs in that way.
Another point: It really is difficult to have passion for everything at once, and especially for issues at different ends of the political spectrum. I don't want to say it's impossible, and I know a few exceptions, but by and large, the "millennial ethics" I discussed above are a natural result of the deliberate intention to focus on some issues (poverty, vegetarianism) as some kind of "corrective" to the "religious right." There are only so many hours in a day, and you only have so much capital to spend trying to convince your friends of things and intensely discussing things. If you're spending that capital evangelizing for vegetarianism or writing about it, I'm just going to say that it's plausible that you are spending a lot less time doing other things in the broadly political realm. So to some extent, yes, there is a zero-sum game going on, and there's a reason why one too often finds that the most passionate vegetarian Christians are wishy-washy (at least) on, say, the wrongness of homosexuality and the evil of homosexual "marriage." There was a great blog post by someone-or-other several years ago about this kind of thing: The blogger was told that it's possible to be "pro-life and" and then decided that practically speaking on the progressive Christian side it wasn't working out that way. If I ever find the link again I'll post it.
There is something quasi-religious about vegetarianism and even more about veganism. The old monks would fast for a fast day and feast for a feast day. Human beings find it satisfying to order their lives in an intentional way that feels significant on the intimate level of eating, sleeping, etc. Christianity, however, does not give detailed rules for these things, so we tend to invent them for ourselves as a practical matter. There's nothing wrong with that, but in my opinion it would be a more healthy Christianity to refrain from eating meat on Fridays in honor of Christ's crucifixion or to fast and pray than to refrain from eating meat on all days in honor of animals. It would be better to satisfy one's desire for detailed, religious order by praying the canonical hours than to examine the food one eats at every meal to try to assure oneself that the animals that produced it had a happy life (by anthropomorphic standards of "happy") and died a peaceful death.