The passage discusses the principles of public international law, emphasizing the importance of understanding and applying these principles in various fields such as armed conflict, human rights, trade, and diplomatic relations. It highlights Ian Brownlie's "Principles of Public International Law" as a comprehensive and authoritative textbook that has been widely used and updated over the years to reflect the latest developments in the field. The book aims to provide a clear and objective overview of the main institutes of international law, making it a valuable resource for both students and practitioners of international law. Additionally, the passage mentions that international law is governed by rules, norms, and standards established through treaties, conventions, and customs, and that the United Nations Charter sets out fundamental principles that underpin modern public international law.The passage discusses the principles of public international law, emphasizing the importance of understanding and applying these principles in various fields such as armed conflict, human rights, trade, and diplomatic relations. It highlights Ian Brownlie's "Principles of Public International Law" as a comprehensive and authoritative textbook that has been widely used and updated over the years to reflect the latest developments in the field. The book aims to provide a clear and objective overview of the main institutes of international law, making it a valuable resource for both students and practitioners of international law. Additionally, the passage mentions that international law is governed by rules, norms, and standards established through treaties, conventions, and customs, and that the United Nations Charter sets out fundamental principles that underpin modern public international law.