Gravity, the Lonely Force: Why the Weakest Force Rules the Universe - Its Coupling Is the Self-Antipodal Half-One

One axiom. One operation. Zero free parameters. Gravity is by far the weakest force, yet it rules planets, stars, and galaxies — because it is unscreenable and always attractive. But why gravity has one sign while the other forces have two is taken as a brute fact. This paper forces it. Gravity’s coupling is the half-One, 1/2 — the unique self-antipodal point of the fold: it is its own Mirror, take(One,1/2) = 1/2. A force whose coupling is its own antipode has no opposite charge, so it cannot be screened and can only add. That is why gravity, alone among the forces, accumulates without cancellation and comes to rule the large-scale universe despite being the feeblest: electromagnetism is strong but its coupling has a true Mirror (two signs) so it cancels in bulk; gravity is weak but self-Mirror (one sign) so it accumulates. The lonely force. The force couplings sum to the One. Machine-checked; reproduces from one command. A standalone result within the Smithian Fold Theory of Everything (SFTOE). Full corpus, code, and the run-it-yourself VERIFY.md protocol: https://github.com/MettaMazza/Smithian-Fold-Theory