There is no better measure of the impact of Thomas Kuhn’s The Structure of Scientific Revolutions than a letter to the editor in the 31 May 1999 Newsweek, which begins, ‘As a middle–aged dyed–in–the–wool country–music lover, I had a complete paradigm shift the moment I first heard Andrea Bocelli’s voice.’ Not that Kuhn was exceptionally clear about what he meant by ‘paradigms’ and ‘paradigm shifts.’ Still, most people take a paradigm to be a general framework within which particular problems in a science – or any discipline or inquiry – will be approached for a while. Interestingly, Kuhn’s own position came to be a kind of paradigm for the study of scientific development. 1