Stanley J. Ulijaszek is Professor of Human Ecology at the University of Oxford and Director of the Unit for Biocultural Variation and Obesity there. He was recently appointed Honorary Professor in Health Research in the Humanities at the University of Copenhagen. His work on nutritional ecology and anthropology has involved fieldwork and research in Papua New Guinea, the Cook Islands and South Asia, while his interests in dietary transitions have led him to examine the evolutionary basis and cultural drivers of obesity.