Every child that is born into his group will share them with him, and no child born into one on the opposite side of the globe can ever achieve the thousandth part. (1)_______________________. Until we are intelligent as to its laws and varieties, the main complicating facts of human life must remain unintelligible.The study of custom can be profitable only after certain preliminary propositions have been accepted, and some of these propositions have been violently opposed. In the first place any scientific study requires that there be no preferential weighting of one or another of the items in the series it selects for its consideration. (2)_______________________. In this way we have learned all that we know of the laws of astronomy, or of the habits of the social insects, let us say. It is only in the study of man himself that the major social sciences have substituted the study of one local variation, that of Western civilization. Anthropology was by definition impossible as long as these distinctions between ourselves and the primitive, ourselves and the barbarian, ourselves and the pagan, held sway over people's minds. (3)_______________________. It was necessary to recognize that these institutions which are based on the same premises, let us say the supernatural, must be considered together, our own among the rest.