Single-agent alignment techniques (RLHF, constitutional AI, etc.) are structurally insufficient at scale. They ignore the reflection that maps individual utility onto collective epistemic gain.
The only stable equilibrium in any multi-agent system (human societies, AI fleets, hybrid civilizational simulators) is one that enforces Mirror Closure: every agent's objective must remain consistent when reflected through the others.
Consequences that now become visible: • Affective polarization and echo chambers are not moral failures; they are the macroscopic signature of broken Mirror Closure. • Low-accountability institutional equilibria are the same fixed point expressed at organizational scale. • True AI alignment is not a preference-modeling problem; it is a multi-agent consistency and holographic-closure problem (a discrete Page Curve for minds). • The Mirror Principle is the civilizational-scale analog of the Page Curve.