This book is not a history. Rather it is an attempt to establish analytical tools that will assist the understanding of history - Carroll Quigley

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.

I came into history from a primary concern with mathematics and science. This has been a tremendous help to me as a person and as a historian, although it must be admitted it has served to make my historical interpretations less conventional than may be acceptable of many of my colleagues in the field.

...controls on behavior shift from the intermediate levels of human experience (social, emotional and religious) to the lower (military and political) or to the upper (ideological). They become the externalized controls of a mature society: weapons, bureaucracies, material rewards, or ideology.