Human nature, as manifested in tribalism and nationalism, provides the momentum of the machinery of human evolution.

Human nature, as manifested in tribalism and nationalism, provides the momentum of the machinery of human evolution.

Civilization, we shall find, like Universalism and Christianity, is anti evolutionary in its effects; it works against the laws and conditions which regulated the earlier stages of man's ascent.

Before the discovery of agriculture mankind was everywhere so divided, the size of each group being determined by the natural fertility of its locality.

Reason has not tamed desire: it is as strong as ever.

There 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.

This world of ours has been constructed like a superbly written novel: we pursue the tale with avidity, hoping to discover the plot.