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.

Christianity has not conquered nationalism; the opposite has been the case nationalism has made Christianity its footstool.

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.

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.

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.

My personal conviction is that science is concerned wholly with truth, not with ethics.