Can animals be regarded as part of the moral community? To what extent, if at all, do they have moral rights? Are we wrong to eat them, hunt them, or use them for scientific research? Can animal liberation be squared with the environmental movement? Taylor traces the background of these debates from Aristotle to Darwin and sets out the views of numerous contemporary philosophers – including Peter Singer, Tom Regan, Mary Anne Warren, J. Baird Callicott, and Martha Nussbaum – with ethical theories ranging from utilitarianism to eco-feminism. The new edition also includes provocative quotations from some of the major writers in the field. As the final chapter insists, animal ethics is more than just an "academic" question: it is intimately connected both to our understanding of what it means to be human and to pressing current issues such as food shortages, environmental degradation, and climate change.