Family system theory, too avoids labeling behaviors as good and bad seeing them as factor of external elements (such as geography or time) that are, often, beyond individual's control and often beyond his or her awareness too. Taking this in mind enables the counselor to not only be more empathic and understanding of client but to also help detach the client from guilt regarding his activities and show him how to effectively reduce his negative behavior in a self-efficacious manner. By seeing the behavior as simply an action that has been learned and robotically repeated / reiterated through the generations, family system theory reuses to evaluate it and teaches the counselor / social worker and client to see it as a negative variable, through no fault of his own, that needs to be altered. Altering it will, in turn, not only make his own life and lives of those who are closest to him happier, but he will also positively impact the lives of countless effected others.
System theory, when applied to treatment of domestic violence, may be helpful too in that it treats not only first-order levels but provides understanding of, and probes underneath, to second-order levels too. First order levels refer to the situation where surface behavior may be changed but the underlying attitude remains unaltered (Nichols & Schwartz, 2005). The perpetrator, for instance, may learn new communication skills but the influence of his cultural internalizations regarding supposed inferiority of the female remains unchanged. System theory, on the other hand, may help the client realize the root of his perspectives and, by so doing, have a greater and more enduring impact on him. This would consequent in a second-order change where the underlying rationale is addressed leading to male and partner affecting a healthier relationship.
It is in this way that I see systems theory as contributing powerfully to amelioration of domestic violence.