How Sadness Survived

Do most types of depression represent an adaptation - an evolved mechanism which has improved our survival and reproductive value in our ancestral environment? ... » 

Do most types of depression represent an adaptation - an evolved mechanism which has improved our survival and reproductive value in our ancestral environment? Has depression been selected? This book makes a contribution to the field of evolutionary psychology(EP) while communicating the issues to a wider audience than EP receives and deserves. «