The question of the genesis of religion is more important than any other historical inquiry. It involves not only the truth or falsity of past events, but the value or the reverse of our ideas and present beliefs. Each of us has something at stake in this investigation. The causes which formerly gave rise to a belief are still, in the majority of cases, those which maintain it in existence in our days, and to take stock of these causes is, whether one intends it to be so or not, to pass judgment on the belief itself. History, if it should ever be complete, would possess here the power of effacing in the future what it had failed to justify in the past. Perfectly to ascertain the origin of religions would be at the same time either to condemn them or to fortify and preserve them.

Established fact that every known race of people is religious.

One point may legitimately be regarded as attained by contemporary criticism. After the labours of Herr Roskoff, M. Réville, and M. Girard de Rialle, it is impossible to maintain that there exist nowadays on the surface of the earth whole peoples absolutely without religion or superstition, which among non-civilized people amount to the same thing.[8] The reason why man is a superstitious or religious being is simply that he possesses a high degree of intelligence. Megalithic monuments (menhirs, cromlechs, dolmens), sepulchres, amulets, are trustworthy evidence of the existence of religion in prehistoric times; and those fragments of bone detached from the skull and pierced with holes to pass a string through—“cranial rounds”—belong, no doubt, to the same category.[9] Manifestations of the religious spirit date back thus to the age of polished stone. And to pass from facts to hypotheses it is conceivable that at the beginning of the quaternary period, perhaps two hundred and fifty thousand years ago, man was already feeding upon vague and elementary superstitions, though he does not appear to have felt sufficient respect for his dead to have dug sepulchres, and although no fetiches belonging to that period have been discovered.

Established fact that religion is of natural origin.

A second point which may be regarded as equally established, and which results in important consequences in the matter of method of research, is that religion, being of natural origin, must have developed slowly and in accordance with universal and regular laws; it must have originated in simple and vague notions of some sort, accessible to the most primitive intelligence. And from that starting point it must have risen by gradual evolution to the complex and precise conceptions which characterize it to-day. It is in vain for religions to believe themselves immutable; they have all of them been borne forward unwittingly by the movement of universal evolution. The great Egyptian Sphinx, who has not changed her position in the desert these four thousand years, might believe herself to be stationary, but she has never ceased for an instant to whirl through space, borne along by the earth’s motion around the sun.

Two contrasted theories of its origin.

It remains to determine what these primary notions that lay at the bottom of all religions were. And here begins the disagreement among the principal authorities on the science of religion. Some of them explain the birth of religion by a sort of mysterious intuition of supra-sensible verity, by a divination of God; others regard it as an intellectual error, a false hypothesis, which was natural, however, and perhaps inevitable to primitive intelligence. The first look upon religion as an immense leap on the part of the human mind over and beyond the limits of the physical world in which we are confined, the second believe it to be born in the beginning of an inexact interpretation of the commonest phenomena of the world, of objects of our senses or of our consciousness; for the first, religion is more than science; for the second, religion is pseudo-science. All idealists—Strauss, Renan, Matthew Arnold—discover in every religion the germ of their own especial form of refined idealism, and bow down before it with a respect that might well appear ironical if they did not affirm themselves to be quite sincere; they see in religions generally the noblest and most lasting product of the human mind. Their extreme adversaries, on the contrary, see no more in the origin of religions than, as Auguste Comte would have said, the expression of a gross fetichism.

Is religion a species of illusion?

It is evident that the problem of the origin of religion, in the new form in which it presents itself to-day, is quite as grave as ever it was; formerly the question was whether religion is revealed or natural; to-day the question is whether religion is or is not true—whether it is or is not the product of an intellectual error, of a sort of inevitable optical illusion which it is the business of science to explain and to correct; whether, in effect, the god of mythical and symbolical religion is not simply a magnified idol.

The positivist theory no longer in possession of the field.