The concept of psychopathic personality in this presentation stresses a disorder of personality development. In these patients one finds a poorly organized personality with contradictory strivings, lacking consistency and unity in experiencing and acting. Disturbances of organization may be noticed in any phase of personality development but for various reasons they are most noticeable in adolescence and adult life. In this concept of personality organization and its disorders, psychologic, physiologic, and social aspects are considered but none of them is made the basic issue. The organization of the personality may be too loose or too rigid. In the too rigid organization, we find unbending persons with, or without, projection. In these persons certain personality features may be exaggerated and adaptation to the demands of life might be difficult. This discussion will be limited to the loosely organized personality with its features of immaturity, dependency and inadequacy, impulsiveness, aggressiveness, and inappropriate control of drives and desires.