Holism and Soul

In On the Soul, Aristotle presents his concept of the human Soul.  In the Nichomachean Ethics, he begins his study of its Happiness, and completes it in the Politics, according to which that Happiness consists in being a Part of a Whole.  However, he also posits that a Whole is prior to its Parts.  If so, then the Soul of the Whole must be present in that of the Part.  Now, the likely candidate in the individual Soul is Mind.  However, by attributing that dimension a capacity for self-contained Contemplation, he isolates it from the greater Whole.  Consequently, his concept of the Polis may be Holistic, but that of the Soul of a Citizen is Atomistic.