Loevinger's stages of ego development

Loevinger's stages of ego development are proposed by developmental psychologist Jane Loevinger (1918–2008) and conceptualize a theory based on Erik Erikson's psychosocial model and the works of Harry Stack Sullivan (1892–1949) in which "the ego was theorized to mature and evolve through stages across the lifespan as a result of a dynamic interaction between the inner self and the outer environment". Loevinger's theory contributes to the delineation of ego development, which goes beyond the fragmentation of trait psychology and looks at personality as a meaningful whole.

Source: Wikipedia — Loevinger's stages of ego development (CC BY-SA 4.0)