The jurisprudence of the Permanent Court of International Justice (PCIJ) has played an important role in the development of modern international law. This book is a guide to the jurisprudence of the PCIJ, including summaries of all its 29 judgments and 27 advisory opinions, grouped by case and by chronological order and focusing on its most influential rulings regarding treaty interpretation, responsibility of States, diplomatic protection, territorial disputes, mandated and trust territories, protection of minorities and procedural issues.