Modern relativity begins from invariance. Special relativity postulates the invariance of light-speed across inertial frames, while general relativity generalizes physical law through covariance and metric curvature. These achievements remain empirically indispensable, yet they leave unresolved a deeper question: what is the source of invariance itself? This paper proposes that Lorentz invariance is not ontologically primary. It is the metric-domain projection of a deeper coherence condition: hypergravity invariance. Hypergravity invariance is defined as the pre-geometric coherence symmetry from which spacetime, metric structure, light-speed invariance, gravitational curvature, and relativistic observables emerge as reduced relational appearances. Within this framework, special and general relativity are not rejected. They are recovered as valid relational limits. Lorentz structure appears where coherence preservation stabilizes as metric geometry. Time dilation, length contraction, and relativistic energy amplification are interpreted as coherence-kinematic signatures, governed by the retained coherence factor η(v) and its reciprocal Lorentz amplification γ(v). General-relativistic curvature is interpreted as the metric projection of coherence-gradient structure. The result is a reframing of relativity: not as the final ontology of spacetime, but as the relational disclosure of a deeper invariant coherence field. Relativity describes the geometry of appearances; hypergravity invariance explains why such geometry possesses stable invariants at all. Keywords Hypergravity invariance; Relativity 2.0; Lorentz invariance; coherence kinematics; metric geometry; quantum gravity; spacetime emergence; coherence-gradient projection.
Philip Lilien (Tue,) studied this question.