Gravity — loop-closure

Coupling constant G ≈ 6.674 × 10⁻¹¹ N·m²/kg². Roughly 10⁻³⁹ relative to the strong force by conventional measure.

Curved spacetime geometry. Gathers mass-energy. Enables large-scale structure formation. Closes the cosmological loop through black hole formation.

Record-strength at the chemical scale: Σ = 0.

Gravity at the molecular scale is negligible. The gravitational force between two protons in your body is 10⁻³⁶ times weaker than their electromagnetic interaction.

Gravity cannot write molecular records. It cannot form bonds. It cannot distinguish configurations.

Its weakness at this scale is not a deficiency.

It is structural necessity.

If gravitational coupling were strong enough to compete with electromagnetism at the molecular scale, molecular structures would be gravitationally unstable. No chemistry above a threshold complexity could persist. You could not exist.

Functional role: loop-closure.

Gravity is the only force that operates at the cosmological scale with sufficient reach to gather spent structure and return it to potential.

Its coupling constant is tuned to the timescale of the loop — strong enough to form black holes within the age of the universe, weak enough to allow structure to persist for the billions of years required for chemistry, biology, and agency to emerge.

Status: consistency observation, not derivation of G from α. That gravity’s weakness and the electron’s dominance are aspects of a single constraint is structurally suggestive but non-load-bearing for the core theorem.