Most veterinarians know Peter Singer from his books In Defense of Animals, and Animal Liberation. His interests, however, go beyond animal welfare, and he has written many books and essays on ethics, poverty, and morality. This book is a collection of essays that cover a broad range of topics, from vegetarianism and veganism to cloning, climate change, euthanasia, and religion. Well reasoned and thought provoking, these essays validated many of the positions I already held, and also got me to think about some issues that I hadn’t really thought too much about before (like the ethics of genetically modified food). An interesting read.