I have been teaching in the Philosophy Department at Harvard University since 1994, when I received my Ph.D. from the University of Pennsylvania. My primary intellectual interest is the nature of the mind and attempts to explain (or at least describe) it from ancient times to the present.

I started out academic life in perceptual psychology, but as a Ph.D. student I started asking too many questions and was sent to the philosophers. Happily, I found the philosophers were asking the same questions! While I have an active interest in ancient and contemporary theories of mind, my research is largely devoted to the early modern period (17th and 18th centuries).

Questions I lose sleep over include: What makes something count as mental? What is consciousness? What is intentionality? What’s the relationship between mind and body? Does unconscious mental life make any sense (and it if does, what’s its relationship to conscious mental life)? What’s the relationship between sensory experience and other forms of thought? Do the senses show us what the world is really like or do we perceive the world through a distinctive human lens? Where in perception do we draw the line between subject and object?