Cultural Sedimentation: Differential Transmission Costs Across Ritual, Language, Narrative, and Value Layers, and the Layer-by-Layer Stripping Mechanism of Civilizational Decline

Why do rituals survive long after the value systems that originally justified them have been replaced? Why does language persist after ethnic ideologies collapse? Why are explicit value systems always the first casualties of revolution while rituals are the hardest to eradicate? These phenomena point to a single structural fact: different components of a civilization have different transmission costs, and therefore different sedimentation depths and decay rates. This chapter formalizes the cross-generational co-nucleus of a civilization as a four-layer composite sedimentation structure within a sedimentation field dynamics framework: Ritual Layer, Language Layer, Narrative Layer, and Value Layer. Cultural layers with lower transmission costs sediment more deeply and decay more slowly — rituals require only repetition without explanation and therefore reach the deepest sedimentation; value systems require explicit endorsement and explanation and therefore remain the shallowest. Each layer sediments and decays independently; civilizational death is not a simultaneous dissolution but a sequential stripping ordered by decay rate. Three results follow. First, the “importance” of a cultural element is structurally independent of its sedimentation depth — structures that can be continued at low cost systematically tend toward deeper sedimentation. Second, civilizational intrusion by external forces typically displaces the value layer first, then erodes the narrative layer, while the language and ritual layers offer the most persistent resistance. Third, the residual structures left after civilizational death (language fragments, ritual vestiges) do not constitute civilizational continuity, but constrain the growth trajectory of successor civilizations through historical residual bias.