The Problem With Materialism and Free Will

I'm interested in asking you about free will since you've mentioned it once or twice in passing so far. It's often seen as a problem for materialism that if human beings are just atoms bumping into each other, then there seems to be no way in which we're meaningfully in control of our actions. I think the physicalist, if he's an open-minded physicalist, can entertain the notion of free will. That is to say, an agent is free, a felony of their choice of an action, which action to do. They have that choice independently of all the causes which are acting upon them.