I have to admit, I was thinking of people I've across who are familiar with his work who were on the middle ground. Not a great sample size, admittedly, but I wouldn't be too afraid to assume that, yes, he has been successful at least partially turning people from the middle ground towards atheism. Okay we'll never really know for certain, but I'm not going to let a little fact like that stop me from making rash statements!
*grin* Just so long as you know that it can't hold a lot of weight until we do a comprehensive study.
This is the thing, I'm sure you know better than me, but I haven't really heard anyone who has got much answer to him. Where are these people with the stronger formulation of arguments for him to tackle?
Well, for example, from what I can recall, he responds to the cosmological (first cause) argument with "Well, what caused God, then?!?!?!?!?!!!1" as if no one had ever thought of that before.
Aquinas' argument from contingency is, in my view, the strongest formulation of the cosmological argument. It goes something like this. There are lots of things in the world which are contingent, meaning that they might not have existed (i.e. their existence isn't necessary). We usually explain their existence in terms of other contingent facts. For example, if I say, "Why is there a tree in the garden?" the answer is, it grew from an acorn. The acorn was there because a squirrel planted it. The squirrel was there because a mummy squirrel gave birth to her. And so on.
Aquinas says that all of these contingent things owe their existence to something else - many of them to other contingent beings. But there cannot be an infinite regress of continent facts. Therefore there must be a
necessary thing on which all contingent things ultimately rely for their existence. This thing is that-which-we-call-God.
Leibniz put it more succinctly: we need an explanation for why there is something rather than nothing. We cannot explain the existence of
all contingent things on the basis of other contingent things (as this, again, would lead to an infinite regress, which is unsatisfactory). Therefore there must be a necessary thing which completes the explanation.
Now of course the counter-arguments to this are many, and they usually fall into an argument that the necessary being in question need not be God, or that an infinite regress is not logically impossible. But the point is that there is a debate still to be had: you can be sure that Aquinas will begin churning out God-like properties for this necessary being as soon as you give him an inch, and it is far from certain that an infinite regress is plausible. The debate is not conveniently ended by someone saying "But what caused God?" because the existence of the God we're talking about is
necessary. It makes as little sense to ask what caused her existence as it does to ask what caused the existence of the number 3.
What annoys me is Dawkins' smug "lol this is a stupid argument that only stupid people will be convinced by" attitude. The fact is that Aquinas wasn't stupid, and nor was Leibniz. These were highly critical, intelligent men, and they are not the only brilliant people to have been convinced by and to have presented convincing formulations of this argument. The same goes for most of the classic arguments for the existence of God. I dislike Dawkins' weirdly anti-intellectual attitude towards what are some actually extremely complex and challenging arguments. His denigration of centuries of remarkable scholarship is very frustrating to me.
I don't think Aquinas was right, of course, but I absolutely don't think he was stupid, either.