Stephen Boyden graduated in Veterinary Science in London in 1947. From 1949 to 1965 he carried out research in immunology in Cambridge, New York, Paris, Copenhagen and Canberra. From 1965 until his retirement he pioneered work on human ecology and biohistory at The Australian National University (ANU) and in UNESCO’s Man and the Biosphere Programme. In the 1970s he initiated and directed the Hong Kong Human Ecology Program, which was the first comprehensive study of the ecology of a city. After retirement (1991) he established and worked with the Nature and Society Forum — a community-based organisation concerned with the well-being of humankind and the environment. He has authored and co-authored many books and articles on biohistory and urban ecology. At present he is Emeritus Professor in the Fenner School of Environment and Society, ANU.