Abstract
Since philosophy follows science in the modern age. Macmurray holds, the emergence of psychology demands a reformulation of the theory of the Self. In the past physics has led to a substance view of the self and biology to a theory of the self as organism; psychology, as a science of human behavior forms the groundwork for a metaphysics of agency which includes the theoretical and the organic, but as derivative, not as primary modes. These Gifford Lectures are provocative and persuasive, and their historical arguments are subtle and illuminating.--J. F. D.