What is the difference between public and private international law?

Public international law and private international law are both forms of international law that serve different purposes. Public international law is a set of rules and principles of general application that outlines the rights and duties of states in their relations with each other. It is largely based on the principles of sovereign equality of states, pacta sunt servanda (agreements must be kept), and non-intervention in another state’s internal affairs. This type of international law applies to relations between states, whether they be bilateral (between two states) or multilateral (between multiple states). In contrast, private international law refers to the rules and principles that regulate private relationships across different countries. This type of law applies to individuals rather than states and is often used to resolve disputes that occur between individuals in different countries. While public international law focuses on the rights of states, private international law focuses on the rights of private entities and individuals. It deals with a wide range of legal issues such as residence, marriage, intellectual property, insurance, and distribution of goods. In short, public international law and private international law are two distinct types of international law that govern different aspects of international relations. Public international law focuses on the relations between states, while private international law focuses on the relations between individuals and private entities. Both forms of international law are important for determining how countries interact with each other and, in turn, for maintaining international peace and security.

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