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By way of paying tribute to Abdus Salam, I recall the ideas of higherunification that he and I initiated. I discuss the current status of thoseideas in the light of recent developments, including those of: (a) gaugecoupling unification, (b) discovery of neutrino-oscillation at SuperKamiokande,and (c) ongoing searches for proton decay. It is remarked that the mass of$\nu_\tau$ ($\sim$ 1/20 eV) suggested by the SuperK result seems to provideclear support for an underlying unity of forces based on the ideas of (i)SU(4)-color, (ii) left-right symmetry and (iii) supersymmetry. The change inperspective, pertaining to both gauge coupling unification and proton decay,brought forth by supersymmetry and superstrings is presented. The beneficialroles of string- symmetries in addressing certain naturalness problems ofsupersymmetry, including that of rapid proton decay, are noted. In the lastsection, attention is drawn to the recent joint works with K. Babu and F.Wilczek, where the influence of neutrino masses and thus of the new SuperKresult on proton decay are noted. In this context, it is remarked that withneutrino masses and coupling unification revealed, the discovery of protondecay, that remains as the missing link, should not be far behind.Comment: Invited talk at the Abdus Salam Memorial meetimg, Trieste, November,  1997; latex, 34 page

WITH NEUTRINO MASSES REVEALED, PROTON DECAY IS THE MISSING LINK