We construct a realistic SU(7) model which provides answers to many questio
ns presently facing the prototype SU(5) SUSY GUT. Among them are a solution
to the doublet-triplet splitting problem, string scale unification, proton
decay, the hierarchy of baryon vs lepton number violation and neutrino mas
ses. (C) 2001 Elsevier Science B.V. All rights reserved.