David Bloor is emeritus professor in the Sociology of Science, and the former director of the Science Studies Unit at the University of Edinburgh. He was educated at the University of Keele (mathematics and philosophy) and the University of Cambridge (experimental psychology). He has published widely on methodological problems associated with the history and sociology of science. He also publishes on the later work of Wittgenstein who (to the irritation of some professional philosophers) he insists on interpreting as a prototype sociologist of knowledge. For the past twenty years he has mainly researched and published in the history of science. His last book, The Enigma of the Aerofoil, was a history of a scientific conflict between British and German aerodynamicists. He is currently writing and researching a book on the history of experimental psychology in Cambridge in which he analyses the link between the Psychology Laboratory and the military.