Ganon/Calamity Ganon represents an "existential threat" to all peoples of Hyrule, transcending any single faction's interests. Yet, throughout the series' history, faced with this imminent common danger, different parts of Hyrule often initially respond by acting independently, even being picked off one by one. This is a classic portrayal of the "collective action problem" in international relations.
The "collective action problem" refers to the tendency for individual members to prioritize "free-riding" or their own short-term interests, even when all recognize that cooperation serves the common good, potentially leading to collaborative failure. In Breath of the Wild, we witness a world destroyed precisely because it failed to solve this problem a century prior. The four Divine Beasts and the Champions were meant to be a "collective security mechanism" against the Calamity, but due to poor internal coordination, enemy infiltration, and other reasons, this mechanism ultimately collapsed.
Link's journey upon awakening is essentially a process of rebuilding a transnational alliance and repairing the collective security apparatus. He must journey to each autonomous region, help them resolve internal crises, regain their trust, and ultimately unite the scattered forces. This perfectly analogizes the immense challenges and necessity of building effective international cooperation (e.g., the United Nations, Paris Agreement) to tackle transboundary threats like climate change or global pandemics in the real world. Hyrule's survival teaches us that isolationism is a shortcut to destruction when facing a shared destiny.