The dragon fight of the first period begins with the encounter with the unconscious and ends with the heroic birth of the ego. The night sea journey of the second period begins with the encounter with the world and ends with the heroic birth of the self.
Neumann provides his most concentrated formulation of the Second Dragon Fight as structurally parallel to but categorically distinct from the first, culminating in the birth of the self rather than the ego.
, The Origins and History of Consciousness (Princeton, 2019thesis