Maybe to be the "Hunter" or the "Hunted" stems from evolutionary instinct? Instinct is the inherent disposition of a living organism toward a particular action. Instincts are generally inherited patterns of responses or reactions to certain kinds of stimuli. In humans they are most easily observed in behaviors such as emotions, sexual drive, and other bodily functions, as these are largely biologically determined. Instinct provides a response to external stimuli, which moves an organism to action, unless overriden by intelligence, which is creative and hence far more versatile. Since instincts take generations to adapt, an intermediate position, or basis for action, is served by memory which provides individually stored successful reactions built upon experience. The particular actions performed may be influenced by learning, environment and natural principles. Generally, the term instinct is not used to describe an existing condition or established state.
Examples can more frequently be observed in the behavior of animals (most in the less intelligent species), which perform various activities (sometimes complex) that are not based upon prior experience, such as reproduction, and feeding among insects. Other examples include animal fighting, animal courtship behavior, and internal escape functions.
It may be worth noting that no being is bound absolutely by instinct. Though instinct is what seems to come naturally or perhaps with heredity, general conditioning and environment surrounding a living being play a major role.
Instinct is pre-intellectual, while intuition is trans-intellectual.
Not sure whether this answers all of your question but read this.
http://www.thenakedsc...index.php?topic=16535