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Standard evolutionary theory explains the body. But human uniqueness — language, cumulative technology, moral systems — requires a second inheritance system: culture. Gene-culture coevolution shows how biological and cultural evolution loop back on each other in ways neither can explain alone.

What if history isn't a sequence of unique events but a recurring pattern of coherence dynamics playing out at macro scale? Cliodynamics — the mathematical science of history — shows the same integrative-disintegrative cycles that operate in individuals echoing across centuries.

Macro disintegration is real, but it's not uniformly distributed. The people who navigate it well tend to share a strategy: build dense coherence locally, resist the pull to amplify fragmentation, and think on timescales longer than the news cycle.

Every disintegrative phase in history has eventually ended. The transitions back toward coherence aren't mysterious — they follow structural patterns. Understanding those patterns is the closest thing history offers to a recovery roadmap.

Societal collapse rarely starts at the bottom. Elite fragmentation — competing factions, eroding consensus, defection from shared norms — is the leading indicator. Coherence at the top matters more than most models admit.

Before political institutions fracture, shared narratives do. Competing accounts of national history, contested identities, futures that can't be reconciled — narrative fragmentation is both symptom and accelerant of cultural disintegration.

Turchin's cliodynamics tracks the rise and fall of social integration with mathematical precision. Reframed in coherence geometry, the patterns become legible: coupling, curvature, and the signatures of collapse.