The habits of a people, which are to a certain extent the product of the country in which they live, in turn have a pronounced effect on their habitations. New Mexico and Arizona came into the possession of the United States in 1846, and prior to that time the Navaho lived chiefly by war and plunder. The Mexican settlers along the Rio Grande and the Pueblo Indians of the same region were the principal contributors to their welfare, and the thousands of sheep and horses which were stolen from these people formed the nucleus or starting point of the large flocks and herds which constitute the wealth of the Navaho today.
The Navajo reservation is better suited for the raising of sheep than for anything else, and the step from the life of a warrior and hunter to that of a shepherd is not a long one, nor a hard one to take. Under the stress of necessity the Navajo became a peaceable pastoral tribe, living by their flocks and herds, and practicing horticulture only in an extremely limited and precarious way. Under modern conditions they are slowly developing into an agricultural tribe, and this development has already progressed far enough to materially affect their house structures; but in a general way it may be said that they are a pastoral people, and their habits have been dictated largely by that mode of life.
Every family is possessed of a flock of sheep and goats, sometimes numbering many thousands, and a band of horses, generally several hundreds, in a few instances several thousands. In recent times many possess small herds of cattle, the progeny of those which strayed into the reservation from the numerous large herds in its vicinity, or were picked up about the borders by some Navaho whose thrift was more highly developed than his honesty. The condition of the tribe, as a whole, is not only far removed from hardship, but may even be said to be one of comparative affluence.
Owing to the scarcity of grass over most of the country, and the difficulty of procuring a sufficient supply of water, the flocks must be moved from place to place at quite frequent intervals. This condition more than any other has worked against the erection of permanent houses. Yet the Navaho are by no means nomads, and the region within which a given family moves back and forth is extremely circumscribed.