The most celebrated and influential modern doctrines, those of Marxand Freud, actually amount to elaborate systems of hermeneutics, aggressive andimpious theories of interpretation.
However far the interpretersalter the text (another notorious example is the Rabbinic and Christian“spiritual” interpretations of the clearly erotic Song of Songs), they mustclaim to be reading off a sense that is already there.
Fear of punishment / disapproval for aggressing may cause displacement (aggression redirected against a target other than the one causing the frustration or even against one's self).
The instinctive theory of aggression claims that aggression builds up whether or not there is any outside provocation until it is likely that aggressive behavior will result.
Frustration aggression theory predicts that when individuals are frustrated & cannot aggress against the source of their frustration, they will attack less powerful groups.
States often, although not always, pursue expansionist policies because their leaders mistakenly believe that aggression is the only way to make their state secure.