3 types of crises that effect physiological change: (1) acute physical crises, e.g. evading a lion (2) chronic physical challenges, e.g. parasites, drought, or famine (3) psychological and social disruptions, e.g. stolen property, Social Security collapse, or loss of a loved one. (6)Our physiological response mechanisms are superbly adapted for dealing with such short-term physical emergencies, e.g. running from a lion. When it is turned on for prolonged periods it is damaging; it has been evolved for handling acute physical emergencies, not our current social ills. (7)

evolved for handling acute physical emergaenc