Psychology has no place in the classification of the fundamental sciences. In it Sociology immediately succeeds Biology. Use has been made of this fact in order to reproach Comte with having neglected an order of most important phenomena. A grave objection has been raised against his doctrine in general. What are we to think of a philosophy which, deliberately, omits a part, and, according to many philosophers, the chief part of reality, the world of consciousness, the spiritual nature of man? Presented in this way, the objection rests upon many confused notions about words and ideas. What do we understand by psychology? If the word means: “the science of the soul reached through the introspective method,” we must own that Comte does not admit the possibility of such a science. But the same objection will also hold good against the majority of the psychologists of our time. For they do not admit this possibility any more than Comte, and they have endeavoured to constitute the science of psychical facts by a different method than that of introspection, pure and simple. Is psychology defined as “the science which investigates the laws of feeling, of the intellect and of moral phenomena in man and in animals?” Then it is inaccurate to say that there is no psychology for Comte. On the contrary, he thinks that positive psychology has just been founded by contemporary science of whose methods he approves. If he did not use the word “psychology,” he did so in order to avoid confusion. At that moment the word was, so to speak, the property of the eclectic school. By the “psychological” method, everyone then understood that of Jouffroy. “Psychology” was the science founded by Cousin on the analysis of the _ego_. Comte who opposes these philosophers, did not wish his theory of psychical phenomena, which differs from theirs, to be called by the same name. It is this very precaution which has come to be no longer understood, now that “psychology” does not designate the eclectic doctrine alone, but any theory whatsoever concerning mental facts. I. Comte finds the field occupied by three psychological schools, and he combats all three, for reasons of method and also of doctrine. He looks to them to refute each other mutually, and he will only attack what is common to them all.[180]