Abstract

By ‘the unity of psychology’ I mean something one might also express by saying that the psychology of human beings is part of the psychology of animals generally. Perhaps there are several different ways of trying to trace out the ramifications of the idea that psychology is one. A central consideration, I think, is likely to be some sort of principle of continuity up and down the scale of nature. The idea would be that up and down the scale of animated or ensouled things there are always psychological continuities, never any strict discontinuity. If human beings can get angry, can want to get ahead in life, can see an illusion, can develop an Oedipus complex, then so can some lower animal do either the very same thing, something similar, or at least something analogous.