Thus we arrive at the following definition: _A religion is a unified system of beliefs and practices relative to sacred things, that is to say, things set apart and forbidden--beliefs and practices which unite into one single moral community called a Church, all those who adhere to them._ The second element which thus finds a place in our definition is no less essential than the first; for by showing that the idea of religion is inseparable from that of the Church, it makes it clear that religion should be an eminently collective thing.[92] CHAPTER II LEADING CONCEPTIONS OF THE ELEMENTARY RELIGION I.--_Animism_ Armed with this definition, we are now able to set out in search of this elementary religion which we propose to study. Even the crudest religions with which history and ethnology make us acquainted are already of a complexity which corresponds badly with the idea sometimes held of primitive mentality. One finds there not only a confused system of beliefs and rites, but also such a plurality of different principles, and such a richness of essential notions, that it seems impossible to see in them anything but the late product of a rather long evolution. Hence it has been concluded that to discover the truly original form of the religious life, it is necessary to descend by analysis beyond these observable religions, to resolve them into their common and fundamental elements, and then to seek among these latter some one from which the others were derived. To the problem thus stated, two contrary solutions have been given. There is no religious system, ancient or recent, where one does not meet, under different forms, two religions, as it were, side by side, which, though being united closely and mutually penetrating each other, do not cease, nevertheless, to be distinct. The one addresses itself to the phenomena of nature, either the great cosmic forces, such as winds, rivers, stars or the sky, etc., or else the objects of various sorts which cover the surface of the earth, such as plants, animals, rocks, etc.; for this reason it has been given the name of _naturism_. The other has spiritual beings as its object, spirits, souls, geniuses, demons, divinities properly so-called, animated and conscious agents like man, but distinguished from him, nevertheless, by the nature of their powers and especially by the peculiar characteristic that they do not affect the senses in the same way: ordinarily they are not visible to human eyes. This religion of spirits is called _animism_. Now, to explain the universal co-existence of these two sorts of cults, two contradictory theories have been proposed. For some, animism is the primitive religion, of which naturism is only a secondary and derived form. For the others, on the contrary, it is the nature cult which was the point of departure for religious evolution; the cult of spirits is only a peculiar case of that.