This book argues that vegetarian and vegan people should be guaranteed the right to eat according to their beliefs. The author claims that the right to vegetarianism is backed by the human and civil rights recognized in the constitutions of several nations. The first half of the book is based on the history of the main philosophical issues involved in eating plant food, from Phytagoras to Francione, while the second part is intended to compare different western legal systems and their report with human and animal rights. The Right to Vegetarianism represents a cross between animal and human rights and also serves as a proposal to support veganism from a different approach: not just as an animal right not yet recognized by the law, but also as a human right, already enforced by the law.