  CommentaryDepression in an evolutionary contextLewis Wolpert  Anatomy and Developmental Biology, University College, London, UK  author email corresponding author email
Philosophy, Ethics, and Humanities in Medicine 2008,
3:8doi:10.1186/1747-5341-3-8
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| Published: |
29 February 2008 |
Abstract
Sadness and low levels of depression are adaptive since they lead the individual to try and make up a loss. By contrast, severe or clinical depression is not adaptive, but can be thought of as sadness having become malignant. | 
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