MESSAGES FOR QCD FROM THE SUPERWORLD

Recent discoveries in supersymmetric gauge theories have significant i mplications for our understanding for QCD and of field theory in gener al. The phases of N = 1 supersymmetric QCD (SQCD) are discussed, and t he possibility of similar phases in non-supersymmetric QCD is emphasiz ed. It is described how duality in SQCD links many previously known du ality transformations that were thought to be distinct, including Oliv e-Montonen duality of N = 4 supersymmetric gauge theory and quark-hadr on duality in (S)QCD. A link between Olive-Montonen duality and the co nfining strings of (S)QCD is explained, in which a picture of confinem ent via non-abelian monopole condensation - a generalized dual Meissne r effect - emerges explicitly. In this picture, unlike previous ones, the confining flux tubes carry the correct Z(N) discrete charges. A nu mber of studies of these subjects, which could be carried out using la ttice gauge theory, are proposed.