I became vegan because I examined diet sceptically.
First, I stopped asking why vegetarians were vegetarian and instead turned the question on myself. The real sceptical question seemed to be "Why did I eat meat?"
I found I couldn't really answer that question, as I had never given my dietary choices any serious thought. They were as ingrained, and as unquestioned, as my earlier, lazy theism was. I had simply never sat down and weighed up the relative benefits of each possible dietary choice, starting from a neutral position. I don't think many people have.
So, that's what I did. I started to list the reasons why I should choose meat eating over vegetarianism. I couldn't think of a single one, other than "Meat tastes good", and that wasn't enough. I'll guide you through my thought process:
1) Health. Is vegetarianism / veganism "healthier" than an omnivourous one? Even if it isn't, it's at least
as healthy, according to the ADA. There are lots of studies pointing out the relative health risks of red meat, processed meat and all the rest, but dietary studies are notoriously unreliable, so let's leave that aside and assume that the ADA is right and cutting animal products out of your life is at least
not harmful. Of course, you need to eat a balanced diet, but even omnivores don't always achieve this.
2) Environment. "Livestock are responsible for 18 percent of greenhouse-gas emissions as measured in carbon dioxide equivalent, reports the FAO. This includes 9 percent of all CO2 emissions, 37 percent of methane, and 65 percent of nitrous oxide. Altogether, that's more than the emissions caused by transportation." and "70% of all grains grown in the US are fed directly to farm animals, unnecessarily adding enormous levels of pesticides, herbicides, and petrochemical fertilizers to the Earth year after year, and consuming more fresh water than any other human endeavor." (
Source). It seems to me that meat consumption is more harmful to the environment than the alternative, plant-based diet. There are plenty of other ways this is borne out, particularly when you consider how wasteful it is to grow food to feed to cows to then eat! See also: over-fishing.
3) Animal suffering. I am not dogmatic or evangelical about this, and I do not believe that a) it is always wrong to kill animals, b) that animals and humans are equivalent or c) that killing animals for food is metaphysically, or morally, wrong. Nevertheless, I believe it is undoubtedly the case that animals do suffer in the production of food. Cows, pigs and chickens all feel pain. I wouldn't kill a cat or a dog or a horse for food, and so I believe that if avoiding animal suffering for other species is possible, it should be pursued wherever possible. This seems to be at least a generally tenable position given laws on animal cruelty etc. If I can live as healthily as I can on a meat based diet, but eliminate unnecessary suffering, then why shouldn't I? In this sense (and in many others), veganism just seems a sensible extension of my broader ethical stance.
4) Convenience. As I said, I am not dogmatic about my veganism, and I am certain that in some cases, having a small-holding and being self-sufficient is a "better" choice. Nevertheless, I buy my food at stores. I do not hunt, or grow my own vegetables. If the soy milk and the regular milk are right next to each other on the shelf, why should I pick the animal milk, given points 1, 2 and 3 above? If the dairy free and the real mayonnaise are right next to each other on the shelf and pretty much indistinguishable from each other, why pick the animal product given 1, 2 and 3 above?
Now, don't get me wrong - I
love the taste of meat. It's just that, having considered the relative merits of both diets, I can't justify eating it. I also love driving my car really fast, but I don't because my personal preferences aren't always sufficient to justify potentially harmful behaviour. And in any case, I'm not starving or denying myself anything at all. There are vegan alternative and analogues to pretty much everything these days.
People always ask me why I'm vegan. I always turn it round and ask them why they eat meat, because when I asked myself that question I never had the answer. It's just about thinking about the way you live your life, and why you hold the beliefs you do. In my humble opinion, non-dogmatic veganism is the logical and rational dietary choice; though if anyone can make the case as to why I
should eat meat, please do.