In this chapter, Peter Batey reviews the career of Sir Peter Hall, a product of Cambridge University where he studied geography under A.A.L. (Gus) Caesar, the renowned director of studies at St. Catharine’s College. He performed exceptionally well as an undergraduate, and this led to the award of a Ph.D. research studentship at Cambridge. His chosen topic was The Industries of London since 1861, which would provide him with the opportunity to develop those elements of his undergraduate degree that he found most fulfilling. Hall’s Ph.D. marked the beginning of what was to be an illustrious academic career that lasted more than fifty years. An initial appointment as a lecturer in Geography at Birkbeck College, London, was quickly followed by a Readership in Regional Planning at the LSE. By this time, Hall was already focusing on cities and urbanization and, linked to that, the theory and practice of planning. He believed that, as a planner and as an applied social scientist, he had a duty to engage responsibly with the potential consequences of present action and inaction. His career was distinguished by high-level engagements with public policy, and he was an archetypal “pracademic,” committed to educators and practitioners learning from each other. He went on to hold key academic appointments at Reading, Berkeley, and University College London, for many years combining his Reading chair with his position at Berkeley. His published output was prodigious. His preferred medium was books, rather than refereed journal articles and, unusually for an academic, he was a firm believer in higher journalism, using it extensively to communicate ideas to wider audiences. Widely regarded as a rising star in his field, Hall helped set up the Regional Studies Association in the mid-1960s, his role as founding editor of its influential journal, Regional Studies proving particularly important. Peter Hall’s scholarship, professional service, and creativity were widely recognized. His awards included a knighthood, 14 honorary doctorates, Fellowship of the British Academy, the Laureat Prix International de Géographie Vautrin Lud (the highest award in the field of geography), the Gold Medal of the Royal Town Planning Institute, and election to Academia Europea.