"No rural population has yet been able permanently to maintain itself against the lure of the town or the city. Each civilization at one stage of its development comprises a large proportion of rural people. But the urban movement soon begins, and continues until all are living in villages, towns, and cities. Such has been the movement of population in all the older countries of high industrial development, as England, France, and Germany. A similar movement is at present going on rapidly in the United States."