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

After years of work in both areas of study, I concluded that the social sciences were different, in many important ways, from the natural sciences, but that the same scientific methods were applicable in both areas, and, indeed, that no very useful work could be done in either area except by scientific methods.

For years I have told my students that I been trying to train executives rather than clerks. The distinction between the two is parallel to the distinction previously made between understanding and knowledge. It is a mighty low executive who cannot hire several people with command of more knowledge than he has himself.

In fact, violence as a symbol of our growing irrationality has had an increasing role in activity for its own sake, when no possible justification could be made that the activity was seeking to resolve a problem.

I am now quite sure that Tragedy and Hope was suppressed although I do not know why or by whom

Hitler's economic revolution in Germany had reduced financial considerations to a point where they played no role in economic or political decisions

The hope for the twentieth century rests on recognition that war and depression are man-made, and needless. They can be avoided in the future by turning from the nineteenth-century characteristics just mentioned (materialism, selfishness, false values, hypocrisy, and secret vices) and going back to other characteristics that our Western Society has always regarded as virtues: generosity, compassion, cooperation, rationality, and foresight, and finding a increased role in human life for love, spirituality, charity, and self discipline.