There was undoubtedly a general trend toward a coalescence of the population, however, and it is interesting to speculate on the reason for this tendency. The fact that the great houses were admirably suited to defense has given rise to the theory that the people began to move together for protection against an outside enemy. There can be no doubt that the need for defense was taken into consideration in the building of the big structures, but this cannot be the whole answer. There is some evidence of violence, but not a great deal. The utmost care was taken in the construction of the great houses, and much time-consuming work went into decoration. When danger threatens, speed becomes the primary consideration, and the amenities of life are sacrificed. There were many small houses in which a good portion of the population lived, and these were not always in locations suitable for defense. Since defense obviously was a consideration in the minds of the builders of the great houses, and since there is some evidence of violence and bloodshed, we cannot discount the role which warfare may have played in architectural development, but it seems certain that this was not the only factor which influenced this development. Another interesting theory has been proposed.[81] It is based on the fact that, not only was there great building activity during this period, but also that there was much restlessness and moving about. Walls were torn down and rebuilt, and many buildings were abandoned and new ones erected, without any reason that is apparent from archaeological evidence. It has been suggested that this restlessness and the intensity with which building activities were pursued may have been an outlet for the repressions and inhibitions of a group which had a cultural pattern with set rules against violence and excess. There is great variation among the different groups which make up the Pueblo Indians of today, but, in many cases, they have a cultural pattern that upholds the golden mean and discourages all extremes.[4] Such a way of life might well produce certain repressions which would result in a general restlessness and desire for change and activity. The chief objection to this theory lies in the defensive character of the great houses, which would suggest that violence was not unknown. In times of war, desire for change and action is readily satisfied, and socially approved reasons are provided for breaking away from many of the established rules of society. Undoubtedly, though, the urge which resulted in the creation of great community dwellings which were in essence city-states, came to some extent from within the people themselves and was not entirely the result of outside influences. Many factors undoubtedly played a part, but the building of the big houses must, in some measure, be regarded as an architectural vogue which, to a great extent, stemmed from the desires as well as the needs of the people.