Despite Miller’s claims, neither human reason nor free will evolved because neither is generated by material processes.
A materialist view of reality leaves out much of reality (love, reason, mercy, truth, etc.) so skittish materialists often call themselves “physicalists.”
Emergence, as a perceptual surprise, can’t explain the mind because emergence presupposes the mind.
Materialism isn’t really a metaphysical theory. It’s just a mistake. It’s a woefully inadequate understanding of nature.