Ego identity, as treated across the depth-psychological corpus, names the constellation of problems arising from the ego’s relationship to its own sense of continuous selfhood — the felt conviction of being ‘I’ across time, roles, and relational contexts. The corpus does not speak with a single voice. Jungian sources, from Jung himself through Edinger, Stein, and Samuels, consistently situate ego identity within the larger drama of ego-Self differentiation: the ego’s identity is always provisional, formed against the background of the Self that both precedes and transcends it, and its health depends on maintaining what Edinger calls the ego-Self axis. Hillman’s archetypal psychology radicalizes this, arguing that ego-identity is not one monolithic thing but is refracted through multiple mythologems and divine figures, such that no single heroic model exhausts what an ego can be. Welwood, approaching from a contemplative-psychological synthesis, treats stabilized ego identity as a compensatory structure masking subconscious deficiency — useful at one stage but ultimately an impediment to transpersonal realization. Carhart-Harris, from a neuroscientific vantage, defines ego identity as the sensation of possessing an integrated and immutable self. Eriksonian measurement enters through Benda’s clinical use of the Ego Identity Scale. The overarching tension runs between those who regard a coherent ego identity as a necessary achievement and those who see its very solidity as the principal obstacle to psychological and spiritual development.