Clinical experience has indicated that where a child has been exposed early in his live to episodes of physical violence, whether he himself is the victim or ... the witness, he will often later demonstrate similar outbursts of uncontrollable rage and violence of his own. Aggression becomes an easy outlet through which the child's frustrations and tensions flow, not just because of a simple matter of learning that can be just as simply unlearned, not just because he is imitating a bad behavior model and can be taught to imitate something more constructive, but because these traumatic experiences have overwhelmed him. His own emotional development is too immature to withstand the crippling inner effects of outer violence. Something happens to the child's character, to his sense of reality, to the development of his controls against impulses that may not later be changed easily but which may lead to reactions that in turn provoke more reactions - one or more of which may be criminal. Then society reacts against him for what he did, but more for what all of us have done - unpleasantly - to one another. Upon him is laid the iniquity of us all...
— Karl Menninger
