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

Whichever theory we adopt to give a rational explanation of human existence, that theory must take into account and explain the mental nature we see at work in all modern communities.

Universalism as an ideal is as old as nay, is probably much more ancient than the Christian ideal.

Tolerance is held to be a condition of mind which is encouraged by, and is necessary for, civilization.

Man is by nature competitive, combative, ambitious, jealous, envious, and vengeful.

Under no stretch of imagination can war be regarded as an ethical process; yet war, force, terror, and propaganda were the evolutionary means employed to weld the German people into a tribal whole.

It is just because civilization is ever evolving, changing, and becoming more complicated, that experts find it so difficult to define it in explicit terms.