A more thorough explanation:

The Law of Nations, also known as International Law, is a legal system that governs the relationships between nations, international organizations, and individuals. It includes laws that apply to states in their mutual relations and to individuals in their relations with states. It also covers matters of international concern, such as human rights and war crimes.

• Customary International Law: This is a type of international law that derives from the practice of states and is accepted by them as legally binding. For example, the Geneva Conventions, which establish the standards of international law for humanitarian treatment in war, are considered customary international law.
• Private International Law: This is also known as International Conflict of Laws. It deals with disputes of a private nature, such as contracts and property rights, that involve parties from different countries. For example, if a person from the United States enters into a contract with a person from France, and a dispute arises, private international law would determine which country's laws apply to the contract.

These examples illustrate how the Law of Nations applies to different areas of international relations, from humanitarian treatment in war to private business transactions between individuals from different countries.