The failure of Christianity in the areas west from Sicily was even greater, and was increased by the spread of Arab outlooks and influence to that area, and especially to Spain.

No scientist ever believes that he has the final answer or the ultimate truth on anything.

Our political organization, based as it is on an eighteenth-century separation of powers and on a nineteenth-century nationalist state, is generally recognized to be semiobselete.

The difference between a stable society and an unstable one is that the restraints in an unstable one are external. In a stable society government ultimately becomes unnecessary; the restraints on people's actions are internal, they're self-disciplined.

The traditional Christian attitude toward human personality was that human nature was essentially good and that it was formed and modified by social pressures and training.

A civilization is complicated, in the first place, because it is dynamic; that is, it is constantly changing in the passage of time, until it has perished.

The process by which civilization, as an abstract entity distinct from the societies in which it is embodied, dies or is reborn is a very significant one.