Infidelity as a Developmental Phenomenon: A Five-Stage Model of Intimacy Breakdown and Repair
Abstract
Infidelity has traditionally been conceptualized as a moral failure, attachment disruption, or individual deficit. While these frameworks offer valuable insights, they often fail to explain why infidelity emerges repeatedly across diverse relational contexts and why its psychological function appears strikingly consistent. This article proposes a developmental hypothesis: infidelity most reliably emerges when couples are structurally confined to oscillations between early stages of emotional organization—specifically Fear–Dependency (Stage 1) and Anger–Detachment (Stage 2). Within this oscillation, affairs function as short-term regulatory solutions rather than relational choices. Drawing on a five-stage developmental model of emotional capacity, this paper reconceptualizes infidelity as a signal of arrested intimacy development and outlines the conditions under which relational repair becomes possible through later-stage capacities of guilt, autonomy, and empathic integration.