Dark Matter & Dark Energy (95% of the Universe) Through the Lens of GCST Global Complexity–Stability Theory as a Thermodynamic Origin of the Dark Sector

Abstract ΛCDM cosmology attributes ~95% of the critical density ρcrit to dark matter (~27%) and dark energy (~68%), with baryonic matter comprising only ~5%. No direct detection of dark matter particles exists, and the nature of dark energy remains open. Global Complexity–Stability Theory (GCST) proposes that both dark components are manifestations of accumulated structural debt D — non-dissipated instability from the early universe. The cosmic stability index is defined as Debt D manifests differently depending on the local complexity gradient ∇C: ● high ∇C → effective attractive mass (dark matter) ● low ∇C → effective negative pressure (dark energy) The observed 95: 5 ratio is tied to Gcosmo (now) ≈ 0. 78–0. 85 → ρD / ρcrit ≈ 0. 92–0. 95.