This theory has been wrought into a somewhat plausible form by the brilliant and imposing generalizations of Aug. Comte. The religious phenomena of the world are simply one stage in the necessary development of mind, whether in the individual or the race. He claims to have been the first to discover the great law of the three successive stages or phases of human evolution. That law is thus enounced. Both in the individual mind, and in the history of humanity, thought, in dealing with its problems, passes, of necessity, through, first, a Theological, second, a Metaphysical, and finally reaches a third, or Positive stage.
In attempting an explanation of the universe, human thought, in its earliest stages of development, resorts to the idea of living personal agents enshrined in and moving every object, whether organic or inorganic, natural or artificial. In an advanced stage, it conceives a number of personal beings distinct from, and superior to nature, which preside over the different provinces of nature--the sea, the air, the winds, the rivers, the heavenly bodies, and assume the guardianship of individuals, tribes, and nations. As a further, and still higher stage, it asserts the unity of the Supreme Power which moves and vitalizes the universe, and guides and governs in the affairs of men and nations. The Theological stage is thus subdivided into three epochs, and represented as commencing in Fetichism, then advancing to Polytheism, and, finally, consummating in Monotheism.
The next stage, the Metaphysical, is a transitional stage, in which man substitutes abstract entities, as substance, force, Being in se, the Infinite, the Absolute, in the place of theological conceptions. During this period all theological opinions undergo a process of disintegration, and lose their hold on the mind of man. Metaphysical speculation is a powerful solvent, which decomposes and dissipates theology.
It is only in the last--the Positive stage--that man becomes willing to relinquish all theological ideas and metaphysical notions, and confine his attention to the study of phenomena in their relation to time and space; discarding all inquiries as to causes, whether efficient or final, and denying the existence of all entities and powers beyond nature.
The first stage, in its religious phase, is Theistic, the second is Pantheistic, the last is Atheistic.
The proofs offered by Comte in support of this theory are derived:
I. From Cerebral Organization. There are three grand divisions of the Brain, the Medulla Oblongata, the Cerebellum, and the Cerebrum; the first represents the merely animal instincts the second, the more elevated sentiments, the third, the intellectual powers. Human nature must, therefore, both in the individual and in the race, be developed in the following order: (1.) in animal instincts; (2.) in social affections and communal tendencies; (3.) in intellectual pursuits. Infant life is a merely animal existence, shared in common with the brute; in childhood the individual being realizes his relation to external nature and human society; in youth and manhood he compares, generalizes, and classifies the objects of knowledge, and attains to science. And so the infancy of our race was a mere animal or savage state, the childhood of our race the organization of society, the youth and manhood of our race the development of science.
Now, without offering any opinion as to the merits of the phrenological theories of Gall and Spurzheim, we may ask, what relation has this order to the law of development presented by Comte? Is there any imaginable connection between animal propensities and theological ideas; between social affections and metaphysical speculations? Are not the intellectual powers as much concerned with theological ideas and metaphysical speculations as with positive science? And is it not more probable, more in accordance with facts, that all the powers of the mind, instinct, feeling, and thought, enter into action simultaneously, and condition each other? The very first act of perception, the first distinct cognition of an object, involves thought as much as the last generalization of science. We know nothing of mind except as the development of thought, and the first unfolding, even of the infant mind, reveals an intellectual act, a discrimination between a self and an object which is not self, and a recognition of resemblance, or difference between this object and that. And what does Positive science, in its most mature and perfect form, claim to do more than "to study actual phenomena in their orders of resemblance, coexistence, and succession."
Cerebral organization may furnish plausible analogies in favor of some theory of human development, but certainly not the one proposed by Aug. Comte. The attempt, however, to construct a chart of human history on such an à priori method,--to construct an ideal framework into which human nature must necessarily grow, is a violation of the first and most fundamental principle of the Positive science, which demands that we shall confine ourselves strictly to the study of actual phenomena in their orders of resemblance, coexistence, and succession. The history of the human race must be based on facts, not on hypotheses, and the facts must be ascertained by the study of ancient records and existing monuments of the past. Mere plausible analogies and à priori theories based upon them, are only fitted to mislead the mind; they insert a prism between the perceiving mind and the course of events which decomposes the pure white light of fact, and throws a false light over the entire field of history.
2. The second order of proof is attempted to be drawn from the analogies of individual experience.