Voluntarism in the depth-psychology corpus is not a unified doctrine but a contested horizon stretching from ancient Greek ethical psychology through Patristic theology into modern clinical theory. The term designates, at its core, the philosophically significant insistence that will — as a faculty irreducible to cognition or passion — is the constitutive ground of moral action, responsibility, and selfhood. The corpus reveals a fundamental historical tension: Greek intellectualism, from Plato through the Stoics, located moral agency in rational cognition (prohairesis, boulēsis), resisting any autonomous concept of will, whereas the Hebraic and Augustinian tradition introduced volition as a distinct, irreducible principle. Dihle’s sustained argument that Seneca’s ‘vague voluntarism’ never crystallized into a clear will-concept before Augustine marks the pivotal scholarly claim. John of Damascus systematizes voluntariness as the condition for praise, blame, and moral accountability. Ricoeur carries the issue into phenomenological action theory, tracking voluntariness through ascription and imputation. Jung, approaching from a different angle, treats the involuntary constellation of psychic contents as a counterweight to ego-voluntarism, challenging the assumption that conscious intention governs psychic process. The clinical literature of motivational interviewing further refracts the problem: autonomous choice is a therapeutic precondition, yet the therapist’s directive role complicates the voluntarist premise. Across these registers, voluntarism names the deep wager — contested by depth psychology — that the self is sovereign over its own acts.