While it is generally accepted that animal welfare matters morally, it is less clear how to morally evaluate the ending of an animal's life. It seems to matter for the animal whether it experiences pain or pleasure, or enjoyment or suffering. But does it also matter for the animal whether it lives or dies? Is a longer life better for an animal than a shorter life? If so, under what conditions is this so, and why is this the case? Is it better for an animal to live rather than never to be born at all? The Ethics of Killing Animals addresses these value-theoretical questions about...

What does the idea of taking 'the point of view of the universe' tell us about ethics? The great nineteenth-century utilitarian Henry Sidgwick used this metaphor to present what he took to be a self-evident moral truth: the good of one individual is of no more importance than the good of any other. Ethical judgments, he held, are objective truths that we can know by reason. The ethical axioms he took to be self-evident provide a foundation for utilitarianism. He supplements this foundation with an argument that nothing except states of consciousness have ultimate value, which led him to hold...

In the first two volumes of On What Matters Derek Parfit argues that there are objective moral truths, and other normative truths about what we have reasons to believe, and to want, and to do. He thus challenges a view of the role of reason in action that can be traced back to David Hume, and is widely assumed to be correct, not only by philosophers but also by economists. In defending his view, Parfit argues that if there are no objective normative truths, nihilism follows, and nothing matters. He criticizes, often forcefully, many leading contemporary philosophers working on the...