Every cow just wants to be happy. Every chicken just wants to be free. Every bear, dog, or mouse experiences sorrow and feels pain as intensely as any of us humans do. In a compelling appeal to reason and human kindness, Matthieu Ricard here takes the arguments from his best-sellers Altruism and Happiness to their logical conclusion: that compassion toward all beings, including our fellow animals, is a moral obligation and the direction toward which any enlightened society must aspire. He chronicles the appalling sufferings of the animals we eat, wear, and use for adornment or "entertainment," and submits every traditional justification for their exploitation to scientific evidence and moral scrutiny. What arises is an unambiguous and powerful ethical imperative for treating all of the animals with whom we share this planet with respect and compassion.