Nezahualcojotl had been deposed, or at least dispossessed of his office, as principal war-chief of the Tezcucans, to which he was at this time (1426) restored by Aztec procurement. The event may be taken as the elate of the formation of the confederacy or league whichever it was.
Before discussing the limited number of facts which tend to illustrate the character of this organization, a brief reference should be made to what the confederacy accomplished in acquiring territorial domination during the short period of its existence.
From A. D. 1426 to 1520, a period of ninety-four years, the confederacy was engaged in frequent wars with adjacent tribes, and particularly with the feeble Village Indians southward from the valley of Mexico to the Pacific, and thence eastward well toward Guatemala. They began with those nearest in position whom they overcame, through superior numbers and concentrated action, and subjected to tribute. The villages in this area were numerous but small, consisting in many cases of a single large structure of adobe-brick or of stone, and in some cases of several such structures grouped together. These joint-tenement houses interposed serious hinderances to Aztec conquest, but they did not prove insuperable. These forays were continued from time to time for the avowed object of gathering spoil, imposing tribute, and capturing prisoners for sacrifice;[205] until the principal tribes within the area named, with some exceptions, were subdued and made tributary, including the scattered villages of the Totonacs near the present Vera Cruz.
No attempt was made to incorporate these tribes in the Aztec confederacy, which the barrier of language rendered impossible under their institutions. They were left under the government of their own chiefs, and to the practice of their own usages and customs. In some cases a collector of tribute resided among them. The barren results of these conquests reveal the actual character of their institutions. A domination of the strong over the weak for no other object than to enforce an unwilling tribute, did not even tend to the formation of a nation. If organized in gentes, there was no way for an individual to become a member of the government except through a gens, and no way for the admission of a gens except by its incorporation among the Aztec, Tezcucan, or Tlacopan gentes. The plan ascribed to Romulus of removing the gentes of conquered Latin tribes to Rome might have been resorted to by the Aztec confederacy with respect to the tribes overrun; but they were not sufficiently advanced to form such a conception, even though the barrier of language could have been obviated. Neither could colonists for the same reason, if sent among them, have so far assimilated the conquered tribes as to prepare them for incorporation in the Aztec social system. As it was, the confederacy gained no strength by the terrorism it created; or by holding these tribes under burdens, inspired with enmity and ever ready to revolt. It seems, however, that they used the military bands of subjugated tribes in some cases, and shared with them the spoils. All the Aztecs could do, after forming the confederacy, was to expand it over the remaining Nahuatlac tribes. This they were unable to accomplish. The Xochimilcas and Chalcans were not constituent members of the confederacy, but they enjoyed a nominal independence, though tributary.
This is about all that can now be discovered of the material basis of the so-called kingdom or empire of the Aztecs. The confederacy was confronted by hostile and independent tribes on the west, northwest, northeast, east, and southeast sides: as witness, the Mechoacans on the west, the Otomies on the northwest, (scattered bands of the Otomies near the valley had been placed under tribute), the Chichimecs or wild tribes north of the Otomies, the Meztitlans on the northeast, the Tlascalans on the east, the Cholulans and Huexotzincos on the southeast, and beyond them the tribes of the Tabasco, the tribes of Chiapas, and the Zapotecs. In these several directions the dominion of the Aztec confederacy did not extend a hundred miles beyond the valley of Mexico, a portion of which surrounding area was undoubtedly neutral ground separating the confederacy from perpetual enemies. Out of such limited materials the kingdom of Mexico of the Spanish chronicles was fabricated, and afterwards magnified into the Aztec empire of current history.
A few words seem to be necessary concerning the population of the valley and of the pueblo of Mexico. No means exist for ascertaining the number of the people in the five Nahuatlac tribes who inhabited the valley. Any estimate must be conjectural. As a conjecture then, based upon what is known of their horticulture, their means of subsistence, their institutions, their limited area, and not forgetting the tribute they received, two hundred and fifty thousand persons in the aggregate would probably be an excessive estimate. It would give about a hundred and sixty persons to the square mile, equal to nearly twice the present average population of the state of New York, and about equal to the average population of Rhode Island. It is difficult to perceive what sufficient reason can be assigned for so large a number of inhabitants in all the villages within the valley, said to have been from thirty to forty. Those who claim a higher number will be bound to show how a barbarous people, without flocks and herds, and without field agriculture, could have sustained in equal areas a larger number of inhabitants than a civilized people can now maintain armed with these advantages. It cannot be shown for the simple reason that it could not have been true. Out of this population thirty thousand may, perhaps, be assigned to the pueblo of Mexico.[206]
It will be unnecessary to discuss the position and relations of the valley tribes beyond the suggestions made. The Aztec monarchy should be dismissed from American aboriginal history, not only as delusive, but as a misrepresentation of the Indians, who had neither developed nor invented monarchical institutions. The government they formed was a confederacy of tribes, and nothing more; and probably not equal in plan and symmetry with that of the Iroquois. In dealing with this organization, War-chief, Sachem, and Chief will be sufficient to distinguish their official persons.
The pueblo of Mexico was the largest in America. Romantically situated in the midst of an artificial lake, its large joint-tenement houses plastered over with gypsum, which made them a brilliant white, and approached by causeways, it presented to the Spaniards, in the distance, a striking and enchanting spectacle. It was a revelation of an ancient society lying two ethnical periods back of European society, and eminently calculated, from its orderly plan of life, to awaken curiosity and inspire enthusiasm. A certain amount of extravagance of opinion was unavoidable.