Human Vulnerability - Humans are weak. Their vulnerabilities can be divided into 2. * Physical vulnerabilities * Personal vulnerabilities
Physical vulnerabilities: Physical needs can be frustrated by physical privations or traumas leading to acute distress experiences such as hunger, thirst, cold, fatigue, the pain of disease or accident or attack, sexual tension. In the animal realm there appear to be something like emotional distress experiences involved with some, at any rate, of the physical ones. Thus there is anger vented in defensive or offensive aggression when the issues concern mating, territory or food. There is fear leading to immobility or flight when under attack, as an alternative to counter-aggression. There is grief in some species exhibited in wailing and mourning when there is separation from parent or offspring or mate. Human beings, it is reasonable to suppose, function in similar ways, with emotional distresses of anger, fear and grief and their behaviors, tied in with physical frustrations.
In animals of the same species, anger with its associated aggressive threat or fight behavior appears to have adaptive functions: it leads to social cohesion and leadership by maintaining dominance hierarchies; it makes for an effective use of available territory (and food) by separating groups out over it; it benefits progeny by selecting out the best parents; it protects the young. Nor, in natural habitats, is it necessarily highly destructive: the norm is often threat behavior or token fights rather than serious wounding and killing, although the latter does occur. Intra-specific aggression among animals seems more harnessed to the preservation of life than to its destruction.
Among monkeys and apes, intra-specific aggression is stronger in baboons, weaker in gorillas and chimpanzees, but in the wild it is almost entirely reduced to threat displays with very little overt fighting. In unusual environmental