What does international law primarily regulate?

International law primarily regulates legal relationships between nations. This includes treaties, agreements, and conventions that establish the rights and responsibilities of states in their interactions with one another. It encompasses a wide range of issues, such as diplomatic relations, trade, human rights, and environmental protection. Through structures such as the United Nations and various international courts, international law provides a framework for resolving disputes and fostering cooperation among countries.

In contrast, the other options focus on areas that are typically not governed by international law. Internal policies of individual states are managed by domestic law, which varies widely from one country to another. Local business practices pertain to the regulations and laws governing businesses within a specific country and do not involve international jurisdiction. Lastly, private corporate contracts are matters of contract law, which is usually decided by national law unless explicitly tied to international agreements. Therefore, the role of international law is fundamentally about managing the relationships and interactions between sovereign states.