Watched a great doco the other night, Stress: Portrait of a Killer, which discussed how much stress humans (try) to cope with now, compared to 100s of years ago.
That your position on the job ladder is enough to give you different health issues to those above you (who will have less issues than you); Folks higher up the job hierarchy (in more dominant positions) have more dopamine in their pleasure centers then folk in more subordinate positions, life just looks better to them.
Stress even seems to effect how (where) fat is deposited on the body, so the typical spreading hips is possibly stress related as well as diet/exercise.
Chronic and acute stress both effect memory.
And an interesting study of baboons, very similar creatures to humans when it comes to stress and it's study, showed a period when a certain troop, due to fatal infection from human's dumed food, lost half their male population. The aggressive Alpha males.
The resultant population actually became more balanced as the norm now was to not be aggressive and possessive. The whole troop as a whole became happier.
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Some stuff on youtube
