Few prospective procreators consider the aesthetic impact of their potential children. But how many more producers of excrement and urine, flatulence… - David Benatar

The (nonhuman) animal predicament is particularly revealing. Confronted with the awful spectacle of billions of animals being eaten, often alive, by predators, humans typically do not attempt to propose any cosmic meaning to those lives. Indeed, the usual monotheistic response is to say that the (or at least one) purpose of animals is to be eaten by others higher up the food chain. It is hard to reconcile that with the existence of a purportedly benevolent God, who surely could have created a world in which billions did not have to die each day to keep others alive.

Killing people or helping them to kill themselves is usually wrong, because continued life is, we assume, usually in those people’s interest. It is extremely implausible, however, to think that continued life is always in a person’s interest. Quality of life can fall to abysmal levels. While there can be reasonable disagreement about how poor the quality must be before life is not worth continuing, it is an indecent imposition on people—an unconscionable violation of their liberty—to force them to endure a life that they have reasonably judged to be unacceptable. Accordingly, it is incumbent on liberty-respecting states to allow assisted suicide or euthanasia for those whose lives have become a burden to themselves.

Humans inflict untold suffering and death on many billions of animals every year, and the overwhelming majority of humans are heavily complicit.