Systems theory recognizes that each person is a part of various systems such as family, school, church group, work group, couple, or dyad. Each system might be thought of as a unique community composed of specific individuals. Our membership in or attachment to any one (or many) of these community systems helps us to identify who we are. Any change or disruption in any component of the system, especially in families or couples, affects the individual. Occurrences such as death, divorce, job loss, relocation, addictive or seriously dysfunctional individuals, arguing and fighting between family members, abusive or irresponsible behaviors, and school crises have a powerful effect upon the individual member. Pursuant to such changes, the individual interacts to exert change on the system.