Across the depth-psychology corpus, ‘individuality’ occupies a pivotal and contested position—at once the goal of psychological development, the problem it must overcome, and a metaphysical puzzle about what constitutes the irreducible unit of selfhood. Jung’s usage is foundational and dual: in the early formulations collected in the Two Essays, ‘individuality’ names what the self ultimately expresses, the ‘innermost, last, and incomparable uniqueness’ that individuation seeks to realize, while the self is defined as ‘the completest expression of that fateful combination we call individuality.’ Jung is equally insistent that individuality is not egotism or individualism—it is the fulfillment of universal factors in a uniquely combined form. Edinger elaborates the etymology: in-dividuum, the indivisible, marks individuality as primary experience irreducible to simpler elements. Hillman recasts it through the acorn/daimon myth, arguing that individuality exceeds both genetic and environmental determination. Fromm interrogates whether modern culture permits genuine individuality at all, or merely its counterfeit. Simondon, from an independent ontogenetic angle, proposes that individuality is constituted through functional autonomy and information-processing capacity rather than substance. Sri Aurobindo and the Yoga tradition each complicate the picture further: individuality may be an eternal property of the purusa or a provisional construction of the ego on its way toward something larger. The tension throughout is whether individuality is an achievement, a given, or an illusion.