This book, the culmination of forty years of theorizing about the moral status of animals, explicates and justifies society’s moral obligation to animals in terms of the commonsense metaphysics and ethics ofAristotle’s concept of telos. Rollin uses this concept to assert that humans have a responsibility to treat animals ethically. Aristotle used the concept, from the Greek word for "end" or "purpose," as the core explanatory concept for the world we live in. We understand what an animal is by what it does. This is the nature of an animal, and helps us understand our obligations to animals.
 

How can science teach us that animals feel no pain when our common sense observations tell us otherwise?

Bernard Rollin offers welcome insight into questions like this in his ground-breaking account of the difficult and controversial issues surrounding the use of animals. He demonstrates that the denial of animal consciousness and animal suffering is not an essential feature of a scientific approach, but rather a contingent, historical aberration that can and must be changed if science is to be both coherent and morally responsible. Widely hailed by advocates of animal welfare and scientists alike on its first appearance, the book now includes an epilogue by the author describing what has changed, and what hasn’t, in this use of animals in scientific research and food production.