"This is a remarkable book by the UK's leading medical anthropologist. Gilbert Lewis was both a professional anthropologist and a trained medical doctor. He brought these skills and extraordinary personal insight when carrying out pioneering fieldwork in Papua New Guinea. In this his final book, he retains the clarity of his original lectures and extends his analysis to healing processes in Africa. It is a striking achievement, invaluable for anyone specializing in medical anthropology today."–Murray Last, author of The Sokoto Caliphate