Things are quite different in the lower societies. The slighter development of individuality, the small extension of the group, the homogeneity of external circumstances, all contribute to reducing the differences and variations to a minimum. The group has an intellectual and moral conformity of which we find but rare examples in the more advanced societies. Everything is common to all. Movements are stereotyped; everybody performs the same ones in the same circumstances, and this conformity of conduct only translates the conformity of thought. Every mind being drawn into the same eddy, the individual type nearly confounds itself with that of the race. And while all is uniform, all is simple as well. Nothing is deformed like these myths, all composed of one and the same theme which is endlessly repeated, or like these rites made up of a small number of gestures repeated again and again. Neither the popular imagination nor that of the priests has had either the time or the means of refining and transforming the original substance of the religious ideas and practices; these are shown in all their nudity, and offer themselves to an examination, it requiring only the slightest effort to lay them open. That which is accessory or secondary, the development of luxury, has not yet come to hide the principal elements.[2] All is reduced to that which is indispensable, to that without which there could be no religion. But that which is indispensable is also that which is essential, that is to say, that which we must know before all else.