This work demonstrates how therapists can apply systems thinking to understand better clients' individual psyches. The Internal Family Systems model IFS uses family system concepts to draw a map of the network of subpersonlities that exist within each individual. Step by step details are combined with clinical examples to illustrate how therapists and clients can enhance their understanding fo intrapsychic processes and set a clear line of direction for positive change. The author also extends IFS concepts to our culture and the families within it to produce a form of couples and family therapy.