Why don't vegans eat honey, wear wool, or visit zoos? Why do they say "no" so often? The zoologist Jordi Casamitjana, author of "Ethical Vegan" and known for securing the legal protection of ethical vegans in Great Britain in a landmark legal case that was discussed all over the world, answers these questions with his characteristic blend of evidence-based arguments and heartfelt conviction. A thought-provoking exploration of vegan philosophy that includes controversial issues still debated within the vegan movement, this book goes deep into the ethical, scientific, and philosophical reasons why vegans reject some products and practices, uncovering an enlightened worldview that challenges exploitation, inspires moral progress, and celebrates sentient life in all its forms. From the main axioms of the philosophy of veganism to the reasons behind refusing backyard eggs, ahimsa silk, oysters, or horse riding, each chapter offers clarity, evidence, and insight for anyone seeking to understand what living by the vegan philosophy means. Whether you are vegan, vegan-curious, or simply wish to comprehend the choices vegans make, this book will challenge assumptions, deepen understanding, and show that saying no to cruelty is saying yes to life.