2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/189625An old idea for explaining the hierarchy is strong gauge dynamics. We show that such dynamics {\it also} stabilises the moduli in $M$ theory compactifications on manifolds of $G_2$-holonomy {\it without} fluxes. This gives stable vacua with softly broken susy, grand unification and a distinctive spectrum of TeV and sub-TeV sparticle masses.4 pages, no figures. Minor typos corrected, References AddedHigh Energy Physics - TheoryHigh Energy Physics - Phenomenologytext