The Indian tribe was a group of people distinguished by the exclusive possession of a dialect in common. It possessed a tribal name and occupied a more or less clearly defined territory; there were also tribal religious rites. Its supreme government was vested in the council of its clan-chiefs and sachems; and as these were thus officers of the tribe as well as of the clan, the tribe exercised the right of investing them with office, amid appropriate solemnities, after their election by their respective clans. The tribal-council had also the right to depose chiefs and sachems. In some instances, not always, there was a head chief or military commander for the tribes, elected by the tribal council. Such, was the origin of the office which, in most societies of the Old World, gradually multiplied its functions and accumulated power until it developed into true kingship. Nowhere in ancient North America did it quite reach such a stage. [Sidenote: Cross-relationships between clans and tribes: the Iroquois Confederacy.] Among the greater part of the aborigines no higher form of social structure was attained than the tribe. There were, however, several instances of permanent confederation, of which the two most interesting and most highly developed were the League of the Iroquois, mentioned above, and the Mexican Confederacy, presently to be considered. The principles upon which the Iroquois league was founded have been thoroughly and minutely explained by Mr. Morgan.[81] It originated in a union of five tribes composed of clans in common, and speaking five dialects of a common language. These tribes had themselves arisen through the segmentation of a single overgrown tribe, so that portions of the original clans survived in them all. The Wolf, Bear, and Turtle clan were common to all the five tribes; three other clans were common to three of the five. "All the members of the same gens [clan], whether Mohawks, Oneidas, Onondagas, Cayugas, or Senecas, were brothers and sisters to each other in virtue of their descent from the same common [female] ancestor, and they recognized each other as such with the fullest cordiality. When they met, the first inquiry was the name of each other's gens, and next the immediate pedigree of each other's sachems; after which they were able to find, under their peculiar system of consanguinity, the relationship in which they stood to each other.... This cross-relationship between persons of the same gens in the different tribes is still preserved and recognized among them in all its original force. It explains the tenacity with which the fragments of the old confederacy still cling together."[82] Acknowledged consanguinity is to the barbarian a sound reason, and the only one conceivable, for permanent political union; and the very existence of such a confederacy as that of the Five Nations was rendered possible only through the permanence of the clans or communal households which were its ultimate units.