The Enneagram of Personality, or simply the Enneagram (from the Greek words [ennéa, meaning "nine"] and [grámma, meaning something "written" or "drawn"]), is a model of human personality which is principally understood and taught as a typology of nine interconnected personality types. Although the origins and history of many of the ideas and theories associated with the Enneagram of Personality are a matter of dispute, contemporary Enneagram understandings are principally derived from the teachings of Oscar Ichazo and Claudio Naranjo. Naranjo's theories were partly influenced by some earlier teachings of G. I. Gurdjieff. As a typology the Enneagram defines nine personality types (sometimes referred to as "enneatypes"), which are represented by the points of a geometric figure called an enneagram, which, it is believed, also indicate some of the connections between the types. There are different schools of thought among Enneagram teachers, therefore their ideas on some theoretical aspects are not always in agreement.
The Enneagram of Personality has been widely promoted in both business management and spiritual contexts through seminars, conferences, books, magazines, and DVDs. In business contexts it is generally used as a typology to gain insights into workplace dynamics; in spirituality it is more commonly presented as a path to higher states of being, essence, and enlightenment. It has been described as a method for self-understanding and self-development.
The origins and historical development of the Enneagram of Personality are matters of dispute. Wiltse and Palmer have suggested that similar ideas to the Enneagram of Personality are found in the work of Evagrius Ponticus, a Christian mystic who lived in 4th century Alexandria. Evagrius identified eight logismoi ("deadly thoughts") plus an overarching thought he called "love of self". Evagrius wrote, "The first thought of all is that of love of self (philautia); after this, [come] the eight." In addition to identifying eight deadly thoughts, Evagrius also identified eight "remedies" to these thoughts.