Everything can be an adaptation, even maladaptation can be an adaptation in general. The debate between adaptation and illness is not productive. One should ask why at first place people try to describe depression, e.g. the phenomenon of a sustainable wish to quit from life, by medical terms. The answer is that whatever the reasons and mechanisms involved, despite that the really depressive people by definition do not ask for help because they do not believe in it and because by definition they prefer to die soon, the non-depressive ones cannot stand depre...
Here, the issue starts to clear out, just becoming non-physics in my mind (as it is trained to understand the world). Now it seems worhty to have read all the previous parts. Thanks.