I'm not sure how being a vegan is a 'relistic' goal for every human. Perhaps I am not understanding this in the abstract, but it doesn't seem logical that not eating meat could be good for the environment. If everyone quit eating meat, then there would be a need for more farms. More farms would mean more pesticides, more erosion, and more pollution from farm machinery. Domesticated animals such as sheep and cows who do not breed in the wild would lose their purpose if not bred commercially, and would eventually die out from either overpopulation or diseases that are normally cared for by humans. Eating meat and using animal products maintains a balance in the natural world -- humans are physically and biologically developed to be omnivores, and are at the top of the food chain, and therefore essential to this natural balance. Furthermore, I can't see how it being a vegan is better for other humans. Is world peace going to be declared or epidemic disease cured if people stop eating meat? Hardly. Perhaps someone could explain the logic of being Vegan=good for everything.