Family systems theory is a therapeutic philosophy based on the belief that people cannot be understood in isolation from one another, but rather as a part of their family. Family systems theory looks at each family as unique and evolving. A family systems approach to therapy always considers the entire family. If any member of the family has a problem, it is viewed as a symptom of as issue in the family group. Family systems therapy helps families to identify the ways their own family functions and to focus on and develop their strengths as a whole.