International law plays a crucial role in regulating state behavior by establishing norms and principles governing interactions among nations. It addresses issues such as human rights, trade, environmental protection, and armed conflict. Through treaties, conventions, and customary law, international law seeks to promote cooperation and prevent disputes between states. Enforcement mechanisms, while often limited, create frameworks for accountability and conflict resolution, encouraging adherence to agreed-upon standards. The existence of international law helps maintain stability and order in global relations, ultimately supporting peace and security.