This work investigates the fundamental distinction between mental health and mental illness, challenging the traditional medical model of psychiatric diagnosis. Dr. William Glasser, a psychiatrist, utilizes his clinical experience to argue that what is commonly labeled as mental illness is often a failure to fulfill basic human needs or a lack of responsibility. He proposes a framework centered on reality therapy, emphasizing the importance of current behavior and personal accountability over the exploration of past traumas or unconscious conflicts.

Experts recognize this text as a foundational document for the development of Reality Therapy and Choice Theory. Readers frequently note the accessible, non-academic tone of the prose, which contrasts sharply with the clinical jargon prevalent in psychiatric literature of the era.