The Geometry of the Eternal Triangle

Jealousy is often imputed to psychopathology in the protagonist. Psychodynamically, it can be attributed to an ego‐deficiency, chronic insecurity, or a deflected libidinal drive. We propose that, when a primary love relationship is threatened, jealousy is best understood from a systems perspective. Three individuals create the experience of jealousy in one of them, which results in a pathogenic “eternal triangle” composed of: the jealous partner who seeks to woo and/or punish an errant mate; the architect of the triangle who takes a lover to supplement the marriage or supplant the mate; and a third person who intrudes across the boundaries of the couple. Therapists must be aware of the role of each agent in order to deal with the volatile, yet highly enduring configuration of the triangle.