Philosophical Foundations of Precedent offers a broad, deep, and diverse range of philosophical investigations of the role of precedent in law, adjudication, and morality. The forty chapters present the work of a large and inclusive group of authors which comprises of well-established leaders in the discipline and new voices in legal philosophy. The magnitude of the resulting project is extraordinary, presenting a diverse array of innovative and creative philosophical investigations of the practice of adhering to past decisions, in law and allied fields of practical reasoning. And by the same token, the contributions elucidate the reasons that courts and other decision-makers may have for departing from what has been done before. The phenomena under investigation include the law and practice of common law and civil jurisdictions around the world. In addition to its fundamental relevance to common law jurisdictions, this work will be of broad and significant interest to theoretically minded audiences in continental Europe, Latin America, and Asia because it involves an extensive study of practices of precedent in civil law systems as well as common law systems.