  We propose a systematic and renormalizable sequential loop suppression
mechanism to generate the hierarchy of the Standard Model fermion masses from
one discrete symmetry. The discrete symmetry is sequentially softly broken in
order to generate one-loop level masses for the bottom, charm, tau and muon
leptons and two-loop level masses for the lightest Standard Model charged
fermions. The tiny masses for the light active neutrinos are produced from
radiative type-I seesaw mechanism, where the Dirac mass terms are effectively
generated at two-loop level.
