This chapter discusses the relationships and interactions between international human rights law (IHRL) and other branches of international law, including collective security law, the law of immunities, diplomatic and consular law, counter-terrorism law, international judicial cooperation, international development law, refugee law, and labor and social security law. It examines how IHRL interacts with and influences these fields, highlighting the challenges and opportunities for integrating human rights principles into various areas of international law. The chapter also discusses the role of international organizations and states in promoting and protecting human rights within the broader context of international law.