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.

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.

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.

The very idea that there is some kind of conflict between science and religion is completely mistaken. Science is a method for investigating experience... Religion is the fundamental, necessary internalization of our system of more permanent values.

The history of the last century shows, as we shall see later, that the advice given to governments by bankers, like the advice they gave to industrialists, was consistently good for bankers, but was often disastrous for governments, businessmen, and the people generally.

To this day the Arab influence is evident in southern Italy, northern Africa and, above all, in Spain.

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