1. Introduction; 2. Human fatness in broad context; 3. The proximate causes of fat deposition; 4. The ontogenetic development of adiposity; 5. The life-course induction of adiposity; 6. The fitness value of fat; 7. The evolutionary biology of adipose tissue; 8. Adiposity in hominid evolution; 9. Adiposity in human evolution; 10. The evolution of obesity.