Personality Types has become the indispensable resource in the field of Enneagram studies, as well as a cherished classic in the literature of personal growth around the world. This second edition is not only a monumental intellectual achievement, it is a landmark in the history of psychology and human understanding. For the first time, the landscape of human personality has been completely mapped out—from the high-functioning states of ego transcendence to the depths of pathology. Unequaled in the Enneagram field, the authors provide precise and comprehensive systematic descriptions of each personality type, as well as new, expanded descriptions of each type's major subtypes and its Directions of Integration and Disintegration. This entirely revised edition reveals new insights, including the authors' revolutionary discovery, the Core Dynamics, which give the specific motivations, attitudes, fears, and desires at each of the nine internal Levels of Development for each type, as well as the parental influences on each type, an expanded history of the Enneagram, new material on the Instinctual Variants, and much, much more.