2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149137Early developments leading to renormalizable non-Abelian gauge theories for the weak, electromagnetic and strong interactions, are discussed from a personal viewpoint. They drastically improved our view of the role of field theory, symmetry and topology, as well as other branches of mathematics, in the world of elementary particles.Minor, cosmetic changes. 19 pages. Plain TeX plus 6 figures in PostScriptHigh Energy Physics - Theorytext