Stuart Hall has inspired, influenced, and often provoked at least two generations of scholars and activists, across Britain and far beyond. He has held distinguished academic positions in both Cultural Studies (a discipline, or discourse, in whose making and remaking he has been a central figure) and Sociology. But his ideas and their impact have not been, and could not be, confined to any disciplinary mould, nor to the academic world alone. He has written on and been a significant and original voice in debates on popular culture, media and the arts, Thatcherism and the future of the Left, Marx and Gramsci, modernism and postmodernism, racial theories and race relations, concepts of diaspora, globalization, ethnicity, identity, and hybridity—and even that is just a near-random selection from among the themes that his work has addressed. His influence may be encountered, his name invoked, among artists and film-makers, especially younger black British ones, as well as academics. Strikingly, in a recent poll seeking to rank the ‘100 Greatest Black Britons’, Hall was the only living intellectual to feature at all prominently (at no. 10) among musicians, sportspeople, and TV personalities. This polymathic presence does not, however, extend to absolute ubiquity: it should be pointed out that the presenter of the once-popular TV show ‘It’s a Knockout’ was an entirely different Stuart Hall. Our Stuart Hall is, on the face of it, very much a ‘public intellectual’. This is a label more familiar in America than in Britain, and one which sometimes seems to mean ‘glib, media-friendly polemicist’. That is clearly not Hall at all, and perhaps the idea of the public intellectual fits him better if it is redefined: not (just) as someone who appears frequently in the public sphere, but as one whose efforts have always been directed towards defending and extending that sphere, its integrity, democracy, and inclusiveness. It is an ethical as well as a political endeavour. Hall’s lifelong adherence to it, no less than the subject-matter and intellectual power of his essay here, makes him an apt choice to open this collection of Oxford Amnesty Lectures.