Using 'IT' with comma

Grammatically there is nothing to say and from the point of view of semantics no ambiguity as the sole referent for "it" cannot be anything else but "personality", provided nothing in the context interferes with this assignation. However, reading this sentence in the light of a variety of possible contexts does not make immediate that "it" stands for "personality"; an unequivocal formulation could be as follows. (I would do away with the article "the".)

• Personality is mostly unconscious because of the innumerable programs that drive it.