For the designations of relationship of which they make use do not take into consideration the relationship between two individuals, but between an individual and his group; they belong, according to the expression of L. H. Morgan, to the ‘classifying’ system. That means that a man calls not only his begetter ‘father’ but also every other man who, according to the tribal regulations, might have married his mother and thus become his father; he calls ‘mother’ not only the woman who bore him but also every other woman who might have
