Part Two clears philosophical ground: what Parfit saw and what he left unresolved; the biological substrate that neuroscience has identified; the formal structure of the self understood as a curve.

Parfit was an Oxford analytical philosopher who, in the mid-1980s, took traditional views on personal identity and through a series of thought experiments demolished the traditional self entirely. His answer, arrived at after many such experiments, was that the question itself is confused. There is no deep further fact about personal identity beyond psychological continuity and connectedness. The self is not a substance with sharp edges. It is a pattern — and patterns can hold to varying degrees, can overlap, can fade.

He called this Reductionism. And it left an important question unanswered. If the self is a pattern rather than a substance, what kind of pattern? What are its dynamics? In one sense the Integral is building something out of the rubble, and in another is standing on the work and shoulders of Parfit. He cleared the ground. The Integral is the idea that gets built on it.

The claim is simple enough to state in a single sentence. Life is the time-integral of the moment. Identity is not a thing; it is a curve. Consider a bicycle in motion. It does not stay upright because it has an essence of uprightness. It stays upright because it is continuously stabilised through micro-corrections. The uprightness is a dynamic achievement, sustained moment by moment. A person is like this. The self is not a thing that experiences life; it is a process that is constituted by experiencing it.