The tradition of natural law is one of the foundations of Western civilization. At its heart is the conviction that there is an objective and universal justice which transcends humanity's particular expressions of justice. It asserts that there are certain ways of behaving which are appropriate to humanity simply by virtue of the fact that we are all human beings. Recent political debates indicate that it is not a tradition that has gone unchallenged: in fact, the opposition is as old as the tradition itself. By distinguishing between philosophy and ideology, by recalling the historical adventures of natural law, and by reviewing the theoretical problems involved in the doctrine, Simon clarifies much of the confusion surrounding this perennial debate. He tackles the questions raised by the application of natural law with skill and honesty as he faces the difficulties of the subject. Simon warns against undue optimism in a revival of interest in natural law and insists that the study of natural law beings with the analysis of "the law of the land." He writes not as a polemicist but as a philosopher, and he writes of natural law with the same force, conciseness, lucidity and simplicity which have distinguished all his other works.

The present volume is the product of several years of collaboration at a distance between two people who both knew Yres R. Simon personally and admired his work. The question raised by Simon more than half a century ago, when this book was first published, are still with us: What is the nature of knowledge? What kind of activity is it to know? What is involved in the development of human knowledge? If one had to describe Simon's accomplishment by reducing it to a single point, what he succeeded in showing was that an ontology of knowledge based on common experience disproves all idealism and leads to realism by strictest necessity.