Almost 1 billion people suffer from undernutrition in developing countries. In this book, Professor Svedberg provides a detailed analytical study of undernutrition in Sub-Saharan Africa, the worst affected area, and provides crucial advice for all those concerned in development worldwide. The book concentrates on the five challenges that undernutrition creates: what undernutrition is, who the undernourished are, where the undernourished are, when people are undernourished, and why people are undernourished.