The city of man, for all of the width of its expansion throughout the world and for all of the depth of its differences in this place and that, is a single community. The simple truth is that the bond of a common nature makes all human beings one. Nevertheless, each individual in this community is driven by his passions to pursue his private purposes. Unfortunately, the objects of these purposes are such that no one person (let alone, the world community) can ever be wholly satisfied. The reason for this is that nothing but Absolute Being can satisfy human nature. The result is that the city of man remains in a chronic condition of civil war. (St. Augustine, City of God, XVIII, 2)