Full disclosure upfront: I am a proud vegan, so clearly I am biased to one side in this debate.
Second disclosure: this is the only post I will ever write on this thread, so feel free to dissect and criticize it as you wish. My intent is not to start a new argument, but to offer new ideas for consideration in these pre-existing arguments. Then you can reject or incorporate my ideas into your arguments as you see fit. I will also make some general comments about where I think this debate has landed after multiple rounds of arguments.
I have followed this thread quite closely and I've been impressed with some of the ideas presented, from both sides. I wanted to add my own thoughts on this debate, focusing on an angle that has not received much attention: the wider social, economic, and ecological relations that mediate and influence our food choices. I think it's important to consider this component of the debate because it can substantially alter the answer to the original question.
Is it wrong to eat animals? I would say it depends on a wide array of factors, and I don't think that this position commits me entirely to moral relativism. The reason why is because some of these factors are determined by biophysical and ecological realities, hence they do not depend on social preference. I am fully supportive of the San in the Kalahari hunting gazelles or the Inuit in Canada hunting seals. These are communities that live in very forbidding ecozones, making an exclusively plant-based diet quite difficult to achieve. The San still
obtained most of their calories from fruits and vegetables gathered by women, but meat was clearly an indispensable part of their diet as well.
We obviously don't live in those worlds. We live in an integrated system of global capitalism, where goods and commodities are exchanged for financial profit and where a small minority of the human population controls the vast majority of surplus wealth. This is the fundamental economic system that lurks behind, in front, and everywhere around that original question. I will argue that eating animals, in the context of modern capitalism, is an objectively bad idea for a number of related reasons. Our moral considerations cannot be fully divorced from these biophysical and ecological factors, hence any moral judgment on whether we should eat animals needs to somehow account for them. The basis for this claim is that the quest for a moral life represents both a social and a philosophical enterprise. In other words, morality is inextricably bound to social relations, and those social relations are themselves coevolving with economic and ecological conditions. Hence we cannot fully analyze the moral dimension of whether to eat animals apart from these conditions.
For your consideration, I present the following three points:
1) Because farm animals are bred for capitalist profit, they are subject to the same dynamics of waste and overproduction that characterize other parts of the global supply chain. Global capitalism slaughters
roughly 60 billion animals a year.
One estimate says that 12 billion of those animals end up dying for nothing: their meat simply gets thrown away. Others are simply considered useless and slaughtered with no intent for consumption. Male chicks are usually tossed into the grinders on their very first day of life.
2) Eating meat from the capitalist food industry has a negative impact on health. Numerous studies point to vegans and vegetarians having longer life expectancy than meat-eaters (see
this and
this for some major ones that came out recently). Other studies show that a diet rich in fruits, vegetables, beans, and nuts will yield the best health outcomes over the long run. The World Health organization has classified red meat and processed meat as likely carcinogenic (see
here). Being vegan is not just the default choice when you want to avoid eating meat while still surviving. It's a way to thrive and contribute positively to your health.
3) The global agricultural and land use industry is responsible for roughly 20% of greenhouse gas emissions,
according to the UN, a huge fraction of which come from raising livestock. These emissions include the biological products of farm animals as well as emissions from logistics, transportation, and other activities that require a large amount of mechanical work. Changing consumption patterns is an important component of making this industry less energy-intensive, though certainly not the only one. Concerted public pressure and state action would also help, but these will probably take a long time to materialize.
In conclusion, it's not simply eating animals that represents the biggest moral problem today. Rather it's an evil economic system that kills so many animals for pure profit, with no intent to actually feed the poor and the hungry around the world. Participating in this system willingly, when its damaging effects are so clear, is what constitutes an immoral offense. Being vegan can represent a small act of revolt against an otherwise corrupt system that seems to be indifferent to the concerns of living things, including human beings, outside of their relationship to the market and their level of wealth.
In following this thread, it has occurred to me that the arguments of the anti-vegan camp, especially from Michael and jastopher, are reducible to the following position:
I will hold any philosophical belief necessary to justify my current methods of energy consumption, or those methods of consumption widely prevalent in society.
For me, the most revealing comment of the entire debate was the following from jastopher, after considering several of the ethical responses available on this issue:
"I like utilitarianism since it permits me to continue to eat meat...."
And that's fundamentally what this entire debate has come down to. It's no longer an argument about who has the best reasons for the ideal moral stance. Instead it's become an exercise for finding any excuses necessary to justify existing lifestyles, lest we have too much pesky radicalism. Better to invent spurious reasons to justify the current state of the world than contemplate any meaningful change to improve our lives. Casual centrism reigns supreme. All the beautiful normative ideals have devolved into the brutal descriptive reality: humans have power over animals, so we can do with them as we please. Might makes right.
What a glorious philosophy!