V79: Environmental Axis Confirmed — Observations and ΛCDM Simulations Support Cumulative-Activity Control of DM Inner Slopes

The dark matter (DM) "zoo" — where CDM appears to succeed at cluster scales but fail at dwarf scales — may reflect not particle diversity but environmental diversity. Building on V78's Environmental Axis Hypothesis, we test the prediction that DM inner slopes (α) are organized by cumulative activity history rather than particle species. Using two independent observational datasets (SPARC, LITTLE THINGS) and ΛCDM simulations (FIRE-2), we confirm: SPARC: A nearly perfect Activity–α correlation (ρ ≈ −1, p < 10⁻⁴⁰) spanning 4+ decades in stellar mass LITTLE THINGS: Predicted core-like saturation in dwarf galaxies — the correct test is phase-region occupation, not correlation strength FIRE-2: Cumulative history dominates over current activity (ρ = −0.97 for z₅₀ vs α, compared to ρ = +0.41 for current activity) Robustness tests confirm no circularity (leave-one-component-out analysis), no single-component dominance, and only 2.3% divergent pairs (all involving starburst outlier NGC1569, as predicted by the temporal hypothesis). The same environmental axis appears consistently across observations and ΛCDM simulations. We conclude that DM inner slopes are organized by cumulative environmental history — not particle species. The "DM zoo" may be a taxonomy not of particles, but of environments. One-sentence thesis: DM inner slopes are organized by cumulative environmental history rather than particle species; the same axis appears consistently across observations and ΛCDM simulations.