Originally published in 1970, this book explores the role of concepts of disease in the social life of the Safwa of Tanzania, particularly through beliefs concerning witchcraft and sorcery. Examining Safwa ideas about the cuasation of disease and death and the use of aetiological terms in actual cases, it demonstrates a parallel between these ideas and terms, on the one hand and the Safwa system of social categories on the other. A descrption of the Safwa environment, way of life and social system is followed by an account of the concepts of death and disease and of their causes as...