Other than demonstrating that you believe Futuyma is the final word on the subject, what's your point? He doesn't address Augustine at all, he just casually announces that Darwin makes theological explanations superfluous. In logic that's called asserting your premise, one of the more simplistic of logical fallacies. Next time try to find an argument that actually addresses what Augustine wrote and its connection with evolution.
Please - http://bfy.tw/JLVn