It must be admitted that no factor could possibly have more speedily impressed upon primitive men the benefits of concerted action and of organization and communal life than the occasional recurrence of a great and imminent peril which was shared by all alike, and for which there was but one visible means of escape. It is equally clear that, once a concerted and united undertaking had been determined upon, some sort of plan and organization must have naturally evolved itself. The mere building of such a gigantic structure as the pyramid of Cholula, which may well have absorbed the energies of several generations of men, or, at all events that of innumerable workmen, could well have been an abiding and most powerful factor in establishing their social organization. Its erection must indeed have marked an epoch in the lives of the inhabitants of this region, because, during many years it created a bond of common interest which, of itself, might well have laid the foundation of a permanent communal life, in which responsibility and labor were equally distributed. The mere necessity to expend an equal amount of material and labor upon the building of each side of the pyramid, would naturally lead to the formation of pathways traced by the feet of the carriers of earth and stone from different directions, and ultimately to a division of the workers into four bands, each associated with a different cardinal point. Practice would demand that each band should be under leadership, and be divided into those who collected and carried material, and those who placed it in position, at each side of the pyramid. The necessity for general supervision and directorship, extending over the four bands of workers alike, would, of itself, create central rulership upon which would devolve the duty of enforcing an equal division of labor, which would create, in turn, some form of systematic routine and rotation. It can thus be understood how, by slow degrees, each side of the pyramid would become permanently identified with a cardinal point; and associated with a division of workmen under its leader and a fixed period of time. It may likewise be seen how a separate caste would slowly develop itself, consisting of the trained architects and builders, the descendants of the first organizers of human labor, and systematical rulers of men.(76) It may thus be seen how the realization of frequent danger, the necessity to provide an escape and insure the safety of the race, aided by experience, might lead to the conception of a vast pyramid, the mere building of which would create and establish the fundamental principles of organization and government.