As base, MacLean shows that creative ability lives not only in the right hemisphere of the neocortex but also in the lower parts of the brain. Other evidence indicates that we are maximally creative when there is an integration between right and left brain, the neocortex, as well as the two lower centers. Imagine the inner creative resource housed in this ancient remnant of this prehistoric lower brain: the feeling, motivation, and ancestral lore of the species.