Eudaimonia — conventionally rendered as ‘flourishing,’ ‘happiness,’ or ‘living well’ — occupies a structuring role in the depth-psychology corpus insofar as it designates the telos around which Greek ethical thought, and its modern inheritors, organize questions of the good life. The corpus treats the term not as a settled answer but as a site of productive contestation. Martha Nussbaum is the dominant voice, reading eudaimonia through Aristotle’s insistence that it requires actual activity, not merely virtuous disposition, and that it remains constitutively vulnerable to fortune, bodily impediment, and the withdrawal of philia. This anti-Kantian, anti-Stoic reading positions eudaimonia as irreducibly embedded in contingency — wealth, friendship, political community, and external goods generally are not mere instruments but constituents of the flourishing life. Against Nussbaum’s Aristotelian account, Arthur Adkins traces the philological and cultural genealogy of eudaimonia within Greek value-terms, showing how it clusters with agathos and kalon in a competitive, honor-saturated moral vocabulary that resists reduction to any categorical imperative. The Stoic reformulation — in which eudaimonia belongs entirely to the virtuous inner condition and is unaffected by external circumstance — figures in Nussbaum’s Hellenistic volume as a radical and finally unstable departure from ordinary belief. The tension between eudaimonia as activity-dependent and therefore fragile, and eudaimonia as self-sufficient and therefore invulnerable, runs through the entire corpus as its governing antinomy.