99% of our uses of animals, including our numerically most significant use of them for food, do not involve any sort of necessity or any real conflict between human and nonhuman interests. If animals matter morally at all, then, even without accepting a theory of animal rights, those uses of animals cannot be morally justified.

We proclaim human intelligence to be morally valuable per se because we are human. If we were birds, we would proclaim the ability to fly as morally valuable per se. If we were fish, we would proclaim the ability to live underwater as morally valuable per se. But apart from our obviously self-interested proclamations, there is nothing morally valuable per se about human intelligence.

People need to be educated so that they can make intelligent moral choices

Even if plants were sentient, veganism would still be a moral imperative given that it takes many pounds of plants to produce one pound of flesh.

To say that a being who is sentient has no interest in continuing to live is like saying that a being with eyes has no interest in continuing to see. Death—however “humane”—is a harm for humans and nonhumans alike.

We should stop bringing more domestic animals into existence.

It costs us so little to go vegan. It costs animals so much if we don't.