Within the depth-psychology corpus, ‘hemisphere’ functions not merely as an anatomical designator but as a conceptual fulcrum around which competing theories of mind, attention, selfhood, and reality are organized. Iain McGilchrist stands as the dominant voice, arguing across both The Master and His Emissary (2009) and The Matter With Things (2021) that the two cerebral hemispheres do not simply divide cognitive labour but enact fundamentally different orientations toward existence: the right hemisphere apprehending the world as a living, contextual, relational whole; the left hemisphere re-presenting it as abstracted, categorised, and manipulable. McGilchrist’s central thesis is that Western civilization has progressively elevated left-hemisphere modes of attention at catastrophic cost. Daniel Siegel reinforces a complementary view, mapping hemispheric asymmetry onto relational and developmental registers, identifying the right hemisphere as the seat of nonverbal, embodied, emotionally resonant experience. Julian Jaynes contributes a historical-evolutionary dimension, speculating that the speechless right hemisphere once housed the ‘divine voices’ of the bicameral mind. The key tensions in this literature concern dominance — which hemisphere is truly ‘major’? — and the asymmetry of inhibition: the left hemisphere actively suppresses right-hemisphere functioning, yet cannot substitute for it. Hallucination, delusion, prosopagnosia, and disorders of identity are overwhelmingly linked to right-hemisphere damage, complicating any simple equation of the right hemisphere with mere supplementary colouring.