This book delivers a general living system theory of personality psychology for complex agencies. It has defined and explored the formative traits, accumulated into Mindsets, that are able to explain agency behaviour. These traits are both agency and personality formative, the personality being subject to sociocultural traits that create an immanent agency context that may overlay personality orientations. Through Agency Theory they can be used to explain the rise of the dark personality ‘local’ traits like Machiavellianism, Narcissism, and Psychopathy, as well as other forms of pathology, and can also be used to explain identities and their pathologies and distortions. Since traits are value based, they are therefore stable, but they are always subject to a potential for change, that is they are essentially dynamic. While attention to the trait dynamics has centred on the cultural trait due to the extensive work in this area by Pitrim Sorokin (1939), all traits are susceptible to their own dynamics. It is therefore tempting to consider a theory referring to the internal dynamics of agency personality psychology systems might be best described by the term psychodynamics.