Wilber once claimed that, if evolution turned out to be explainable on the basis of reductionistic, naturalistic principles, then that is what AQAL theory would include:
But overall integral theory doesn't hang on that particular issue. If physicalistic, materialistic, reductionistic forces turn out to give an adequate explanation to the extraordinary diversity of evolutionary unfolding, then fine, that is what we will include in integral theory. And if not, not.
That seems like a strong statement. Isn't the idea of an onward and upward striving evolutionary process key to the AQAL model? What if the "Spirit of Evolution" turns out to be a Ghost? Given the—often emotionally charged—way that Wilber has argued for a "spiritual" view of evolution, in contrast to the "reductionist", scientific view, one almost senses that he needs science to fail on its own, to be able to promote his alternative.
Wilber's post-metaphysical spirituality still has many unsolved problems and ambiguities (such as an "immanent telos" driving evolution, not to mention the "intra-physical" nature of consciousness, as dealt with in "My Take on Wilber-5"). In my opinion,