2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48525We give a new mechanism for generating very small, and almost degenerate, neutrino masses, without resorting to the see-saw mechanism or unnatural small Yukawa couplings. It requires the existence of at least 4 families with an almost democratic structure for the Yukawa couplings. It is also proven that this structure can account for large lepton mixings of the three light leptons.3 pages, ReVTeXHigh Energy Physics - Phenomenologytext