The problem of moment formation in metallic systems lies at the interface of localized and itinerant magnetism. The phenomena observed correspond to destruction rather than to formation of spin-correlations. They give rise to the progression from local ized ground states through Kondo and mixed-valence behaviour to itinerant magnetic or non-magnetic systems. Somewhere in the pro gression superconductivity can occur in the presence of f-moments. To bring together the disparate ideas and methods, previously the subject of intense debate only at a number of topical confer ences, a two-week Advanced Study Institute was held August 21 - September 02, 1983, at Lester B. Pearson College of the Pacific, Vancouver Island. In the stimulating environment provided by the pines and fiord at the site of this remote United World College on the Canadian West Coast, scientists and students from around the globe gathered to hear lectures by experts. The Study Institute involved seventy-six people and followed in the tradition . of pre vious Banff summer schools organized by the Canadian Association of Physicists. It was made possible by grants from the North Atlantic Treaty Organization, the Natural Sciences & Engineering Research Council of Canada and Atomic Energy of Canada. The grants permitted many young scientists from Nato and non-Nato countries to learn the fundamentals as well as the latest results in the field.