The Universe Doesn't Expand Into Anything: It Creates the Space It Needs

Natural Evolution of Actuality (NEA) is a constructive theory of physical realization grounded in independently lawful abstract parental responsibilities and primitive consequential joining. It does not presuppose a spacial exterior into which it expands. The established NEA cosmological source relates the volume of a selected realized causal-address region to the product of its actualized address count and effective cell volume. Under isotropic developed geometry, it determines that the expansion rate is one-third the sum of the fractional growth rates of the address count and the effective cell volume. We preserve that source-owned identity and extend it in six ways. First, a nested dyadic-address construction on intrinsically metricized three-tori gives an explicit mathematical witness in which the realized address set, physical volume, and inter-address distance grow without embedding the spatial carrier in an exterior metric container. Second, a general volume–scale theorem and its finite-step counterpart distinguish newly actualized addresses from a change in existing address volume. Third, an exact non-identifiability result proves that isotropic expansion and redshift alone determine only the total volume—the product of address count and cell volume—rather than either factor separately. A complementary No Silent Erasure counterexample shows why that ratio can nevertheless be insufficient for later physical tasks. Fourth, we derive the conditional acceleration and curvature identities for an arbitrary positive address-volume history, while keeping the address-source dynamics and developed clock calibration explicit. Fifth, under separately declared null photon transport and calibrated comoving clocks, we derive a common redshift and signal-duration relation governed by the cube root of the ratio between observed and emitted total volumes. Sixth, the exact finite-capacity network solution is shown to remain compatible with a regular turnaround, separately specified causal-orientation exchange, and append-only consequential History. These are mathematical existence and consistency results for developed NEA descendants. They neither identify a unique physical selection mechanism nor independently establish the observed expansion history or an explanation of its acceleration.