John Archer 
Nature of Grief [PDF ebook] 
The Evolution and Psychology of Reactions to Loss

The Nature of Grief is a provocative new study on the evolution of grief. Most literature on the topic regards grief either as a psychiatric disorder or illness to be cured. In contrast to this, John Archer shows that grief is a natural reaction to losses of many sorts, even to the death of a pet, and he proves this by bringing together material from evolutionary psychology, ethology and experimental psychology.This innovative new work will be required reading for developmental and clinical psychologists and all those in the caring professions.