How Not to Naturalize the Theory of Action

This paper is really written for my small son. When he was about six years old he received one of those anatomy books in which different parts of the body pop up at you in the most remarkable ways. Here he first learned of the way in which our limbs are moved by muscle contractions, and how the muscles, in their turn, are stimulated by the nerves and so on. He had evidently been thinking about this, and one day as we were walking in the company of a non-philosophical friend, he asked — a propos of nothing — “Daddy, if the brain makes the muscles work, what makes the brain work?”