Civilizational collapse

Civilizational collapse is the loss of the institutional, technological, and knowledge infrastructures required for a society to maintain its complexity and recover from perturbations. Unlike societal transformation — in which one set of institutions replaces another — collapse is characterized by a persistent reduction in social complexity that cannot be reversed by the society's own efforts. The canonical examples include the Bronze Age collapse of the Eastern Mediterranean circa 1177 BCE and the disintegration of the Western Roman Empire.

From a systems-theoretic perspective, civilizational collapse is not an event but a phase transition: the crossing of a threshold beyond which the feedback loops that maintain complexity become self-damping rather than self-reinforcing. The mechanisms include cascading failure in interdependent subsystems, the loss of epistemic infrastructure that prevents error correction, and the fragmentation of political authority into units too small to maintain the technologies and institutions that depend on scale. The critical question for contemporary existential risk is whether modern civilization's complexity has outrun its resilience — whether we have built a system so tightly coupled that no subsystem can fail without threatening the whole.