The investigations of Morgan bring, moreover, other interesting facts to light. Although the "pairing family" of the Iroquois starts in insolvable contradiction with the terms of consanguinity in use among them, it turns out that, as late as the first half of the 19th Century, there existed on the Sandwich Islands (Hawaii) a family-form that actually tallied with that which, among the Iroquois, existed in name only. But the system of consanguinity, in force in Hawaii, failed, in turn, to tally with the family-form actually in existence there. It referred to an older family-form, one still more primitive, but no longer extant. There, all the children of brothers and sisters, without exception, were "brothers" and "sisters." Accordingly, they were not considered the common children of their mothers and of the sisters of these, or of their fathers and of the brothers of these, but of all the brothers and sisters of their parents, without distinction. The Hawaiian system of consanguinity corresponded, accordingly, with a stage of development that was lower than the family-form still actually in existence. Hence transpires the curious fact that, in Hawaii, as with the Indians of North America, two distinct systems of consanguinity are, or rather, at a time, were in vogue, which no longer tallied with actual conditions, but were both overtaken by a higher state. On this head Morgan says: "The family represents an active principle. It is never stationary, but advances from a lower to a higher form as society advances from a lower to a higher condition, and finally passes out of one form into another of higher grade. Systems of consanguinity, on the contrary, are passive; recording the progress made by the family at long intervals apart, and only changing radically when the family has radically changed." The theory,--even to-day generally considered conclusive, and which is stubbornly upheld as irrefutable by the representatives of the _status quo_--to the effect that the existing family-form has existed since time immemorial, and, lest the whole social fabric be put in jeopardy, must continue to exist forever, turned out, accordingly, after these discoveries of the investigators, to be wholly false and untenable. The form, under which the relations of the sexes appear and the situation of the family is raised, depends rather upon the social conditions, upon the manner in which man controls his subsistence. The form changes with the changed degree of culture at each given period.