International treaties affect national sovereignty by requiring states to adhere to agreed-upon terms that may constrain their independent decision-making. While they can enhance international cooperation and address global issues, treaties often necessitate some compromise on sovereign rights. This can foster tensions between national interests and international obligations, as governments must balance domestic priorities with treaty commitments. Moreover, treaties can empower international bodies with oversight authority, which might challenge traditional notions of sovereignty. Thus, while beneficial for global governance, international treaties present a complex interplay between collaboration and autonomy for nations involved.