ABSTRACT
P: There is a great problem concerning the way in which we may conceive of interaction between the self and the brain and, indeed, a wider question as to whether two entirely different worlds can be open to each other and interact with each other. I have discussed this question in my historical chapter P5, but only in a negative way; namely, by saying that the usual way of posing the question is really illegitimate because it is based on a view of causality which has been superseded by the development of physics. The Cartesian model of interaction between extended bodies which gave rise to this problem has certainly broken down completely: it is inapplicable to modern physics.
