The notion of sovereignty affects international treaties by establishing the principle that states have the authority to govern themselves without external interference. This concept can lead to tensions between national interests and global cooperation, as countries may prioritize sovereignty over compliance with international agreements. Sovereign states often negotiate treaties that reflect their unique contexts, balancing domestic concerns with international obligations. However, strict adherence to sovereignty can hinder collaborative efforts to address global challenges, such as climate change and security. Thus, the relationship between sovereignty and treaties is crucial in shaping international relations.