Capitalism might be defined, if we wish to be scientific, as a form of economic organization motivated by the pursuit of profit within a price structure.

Islam, the third in historical sequence of the ethical monotheistic religions of the Near East, was very successful in establishing its monotheism, but had only very moderate success in spreading its version of Jewish and Christian ethics to the Arabs.

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

It is clear that every civilization undergoes a process of historical change. We can see that a civilization comes into existence, passes through a long experience, and eventually goes out of existence.

Each individual in a society is a nexus where innumerable relationships of this character intersect.

When we approach history, we are dealing with a conglomeration of irrational continua. Those who deal with history by nonrational processes are the ones who make history, the actors in it.

The social sciences are usually concerned with groups of persons rather than individual persons. The behavior of individuals, being free, is unpredictable.