General relativity tells us how curved spacetime behaves. It does not by itself tell us why reality possesses a geometry that can curve in the first place. This paper asks that deeper question while preserving the mathematical definitions that make curvature precise. The central correction to the earlier exploratory framework is simple but decisive: a gradient of coherence is not itself the Riemann curvature tensor. Curvature becomes mathematically meaningful only after local frames and a connection exist. Differential coherence concentration is therefore treated as a possible generative condition for relational differentiation, not as geometric curvature itself. The mature sequence is: relational order → coherence concentration → relational differentiation → local frame → connection → transport nonclosure → curvature Within that sequence, torsion and curvature arise as distinct Cartan closure defects: torsion belongs to the coframe/translational sector, while curvature measures rotational nonclosure of connection transport. Curvature is the local geometric measure of structured rotational nonclosure under relational transport. This statement does not replace the standard definition of curvature. It interprets the standard curvature two-form once a connection has emerged, while locating the unresolved foundational problem one level deeper: how pre-geometric relational data reconstruct a coframe and connection without presupposing geometry. What Is Established and What Remains Open Established — the Cartan definitions of torsion and curvature, the relation between local curvature and infinitesimal holonomy, and the Palatini–Cartan/Einstein–Cartan route with the appropriate GR limit. Constructed — coherence concentration, coherence-deformation structure, closure-defect language, basin architecture, and scale-indexed closure variables used to organize the framework. Conditional — the bridge from differentiated relational organization to an emergent coframe and connection. Open — a non-circular reconstruction theorem, a quantitative mass-from-closure functional, and any nontrivial scale law for effective curvature. Developmental Position This manuscript is a reconstruction rather than a line edit of the earlier curvature investigations. It retains their deepest question—the origin of curvature—but revises several exploratory identifications. In particular, coherence concentration is separated from geometric curvature; torsion is no longer treated as a necessary precursor of curvature; “time curvature” is replaced by proper-interval and phase-accumulation language; and hyperfractal curvature is narrowed to a testable scale-dependent effective-curvature program. The result is intended to function as the foundational curvature paper for the program: the standard geometric spine is kept exact, the generative ontology is stated conditionally, and the remaining mathematical burden is exposed rather than hidden. Curvature is one of the foundational objects of modern physics, yet its geometric definition does not by itself answer a deeper question: why should physical reality possess a structure capable of curvature at all? General relativity describes curvature through a metric and its associated connection, while differential geometry identifies curvature with the noncommutativity of covariant transport. These constructions are mathematically precise once geometric structure is supplied. They do not, however, determine whether geometry itself is fundamental or derived. This paper develops a layered reconstruction of curvature from a proposed pre-geometric relational architecture. The central distinction is between coherence concentration, understood here as an intensification of organized relation, and geometric curvature, which becomes meaningful only after a local frame and connection have emerged. Differential coherence concentration is therefore not identified with the Riemann tensor. Rather, it is treated as a candidate generative condition for differentiation of the relational structure from which a connection can arise. Once a coframe and connection exist, curvature and torsion are defined in their standard Cartan forms, This establishes a decisive separation: curvature is rotational transport nonclosure, whereas torsion is coframe or translational closure defect. Neither is generally reducible to the other. The framework then reinterprets gravitational time dilation without requiring a literally curved substance called time. Local clock rate is treated as accumulated phase or ordering along a physical trajectory, while curvature governs the comparison and transport of local frames. Mass is correspondingly approached not as curvature itself but as a possible persistent localization or closure class whose exact derivation remains open. At the dynamical level, a minimal tetrad–connection theory admits the Palatini–Cartan action and hence Einstein–Cartan dynamics; the torsion-free sector recovers ordinary general relativity. A final extension reformulates the earlier idea of hyperfractal curvature more conservatively as a question of scale-dependent effective connection and curvature under coarse-graining. The resulting hierarchy is The proposal does not claim to have derived spacetime geometry uniquely from coherence. It instead isolates the exact mathematical bridge that such a derivation must cross, separates established geometry from conditional ontology, and converts an exploratory curvature program into a falsifiable and progressively formalizable research architecture. Keywords: curvature; coherence concentration; relational closure; connection; holonomy; torsion; phase-spatial invariance; Einstein–Cartan gravity; emergent geometry; partial closure; scale-dependent curvature.
Philip Lilien (2026) studied this question.