Abstract

Descartes bequeathed to his successors what he and they thought to be a sharp, deep split between the mental and the material. He thought it was a split between things, with every thing belonging to one of the two kinds and no thing belonging to both. According to him, a human being is a pair, a duo, a mind and a body; or, more strictly, a human being is a mind that is tightly related to an animal body. The exact nature of that relation was one of the problems that Descartes never solved to his own satisfaction, let alone to anyone else’s. Not all of those who took over the split thought that it was a split through things. It was possible to hold - as I am sometimes inclined to - that material properties are radically different from mental properties, neither being reducible to the other, and yet there are single things, not pairs or duos or small committees, that have properties of both kinds. In the language of the 17th century, that is the belief that matter can think, i.e. that an item that bumps and shoves its way through space can also be the subject of thoughts and experiences and perceptions. In that century an impressive amount of intellectual energy went into debating whether matter could think. I’m going to pick out of that debate certain strands that I hope are still of interest today. They certainly interest me. Such understanding as I have of the philosophy of mind - I mean of what is actually true about mentality, not merely of the history of men’s opinions about it - has come from tracking some of the 17th century writers as they beat their way through the undergrowth. I don’t mean that they eventually led me to true conclusions, which I gratefully swallowed. They got most things wrong, I believe; but there is a lot to be learned from working out where they were wrong and why.