Freedomain Radio

Does noticeable depression aid in survival?  Hmmm....

Thomson based his approach on the idea that depression is not simply a disease to be eliminated, but a way of eliciting support from family and friends. It's a concept derived from evolutionary psychology, a burgeoning field that is starting to influence psychotherapy.

(via Digg)

 

I doubt that arousing sympathy is depression's competitive advantage exactly, but it comes close.  Depression is a defense strategy with two main symptoms:  shyness and laziness.  Both aspects are important for keeping someone out of trouble by minimizing exposure.  Eg, if bad weather weren't depressing, then cavemen would frolic in a blizzard at great peril.

Depression can't possibly be a reason for survival anymore than laziness is.  Those who are depressed are capable of surviving on their own, there is no physical limitation on their ability to work.

I'm highly skeptical of the conclusions made about depression as a "chemical imbalance" only curable by medication.

Nathan:

Depression can't possibly be a reason for survival anymore than laziness is.

Either inhibition or excitation is beneficial depending on the circumstance.  Eg, a frightened bunny can freeze, or a cold bear can hibernate, or a tired person can sleep.  Even humans have a hibernation reflex, aka "seasonal affective disorder" or "winter depressive".  Feelin grey's an evolutionary adaptation.