Adam-Gibbs theory (1965) links slow glass relaxation to cooperatively rearranging regions (CRRs). As T → T_K (Kauzmann temperature), configurational entropy S_c → 0 and CRR size z* → ∞.
log(τ/τ₀) = A / (T · S_c(T)) ≈ DT₀/(T−T₀) (VFT)
Fragility m measures the steepness of log τ vs T_g/T — strong glasses (m~20) follow Arrhenius; fragile glasses (m~100+) show super-Arrhenius divergence. The CRR visualization shows growing cooperative domains on cooling. KWW (stretched-exponential) decay φ(t) = exp[-(t/τ)^β] is shown.