How will have to we treat non-human animals? On this immensely powerful and influential book, Peter Singer addresses this straightforward question with trenchant, dispassionate reasoning. Accompanied by the disturbing evidence of factory farms and laboratories, his answers triggered the birth of the animal rights movement. Within the decades since this landmark classic first seemed, some public attitudes to animals can have changed but our continued abuse of animals in factory farms and as tools for research shows that the underlying ideas. Singer exposes as ethically indefensible are still dominating the best way we treat animals. As Yuval Harari’s brilliantly argued preface makes clear, this book is as relevant now as the day it used to be written. With a new introduction by Yaval Harari, creator of the most efficient-seller Sapiens.