+**Decline theory** posits that societies and civilizations are inherently susceptible to a process of decay and eventual collapse. This perspective often explores the causes and patterns of such downturns, ranging from [Internal Factors](/wiki/internal_factors) like moral decay or political instability, to [External Pressures](/wiki/external_pressures) such as environmental degradation or invasions.
+## See also
+- [Civilizational Collapse](/wiki/civilizational_collapse)
+- [Societal Change](/wiki/societal_change)
+- [Historical Cycles](/wiki/historical_cycles)
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