Before the discovery of agriculture mankind was everywhere so divided, the size of each group being determined by the natural fertility of its locality.
Arthur KeithThere are the further difficulties of building a population out of a diversity of races, each at a different stage of cultural evolution, some in need of restraint, many in need of protection; everywhere a bewildering Babel of tongues.
Arthur KeithThe main force used in the evolving world of humanity has hitherto been applied in the form of war.
Arthur Keith