Moral codes adjust themselves to environmental conditions.

Most of us spend too much time on the last twenty-four hours and too little on the last six thousand years.

There is no real philosophy until the mind turns around and examines itself.

There is no significant example in history, before our time, of a society successfully maintaining moral life without the aid of religion.

The concentration of wealth is a natural result of this concentration of ability, and regularly recurs in history. The rate of concentration varies (other factors being equal) with the economic freedom permitted by morals and laws.

History is mostly guessing; the rest is prejudice.

Moral codes adjust themselves to environmental conditions.