Primordial Phase Transition and Early Structure Formation in an Evolving Gravity G(t) Cosmology

We propose a cosmological framework where the primordial state of the universe is dominatedby pure energy (P ≈ 10113 Pa) that progressively converts into matter. In this scenario, thegravitational coupling G is not a static constant but an emergent, evolving function G(t) of theincreasing mass density. This transition modifies the thermal history of the early universe, leadingto a neutral hydrogen recombination at approximately t ≈ 8, 000 years post-Big Bang. Our modelpredicts an enhanced growth of density perturbations (δ ∝ t1), providing a natural explanationfor the massive, mature galaxies observed by the James Webb Space Telescope (JWST) at highredshifts (z > 10) without invoking dark components.