THE PURPOSE OF THIS BOOK is -To answer the question "what kind of realism fits and explains the ancient Greek mentality?." -to find out to what extent ancient Greek Realism involves at least the claim that there is a reality independent of us and our minds, and that what we think understand and recognize does not necessarily exhaust what that reality involves (chapter 1). -to show that ancient Greek realism is compatible a). with a modern non-linguistic, non-analytical philosophical realism, b). with a direct realist causal theory of perception and knowledge (ch. 1), and c). with commonsense realism (ch. 1.2.1 and 3.2.1.) -to show that this kind of realism is the most influential way in which ancient Greeks view the world and their life (ch.1 and 2). - to examine the ethics of ancient Greek realism and to see how modern readers and specifically twenty three (23) American students interpret (and respond to) ancient Greek realism as a way of life (ch. 2) -to examine the anti-realist sceptical trends in ancient Greek thought and the relationship between skepticism and anti-realism (ch. 1 and 3) -to see what is the modern version of Ancient Greek Realism according to the Radical Academy, Center for Applied Philosophy, Oregon, USA (ch. 1).; the author is a consulting fellow in Greek Philosophy at the RADICAL ACADEMY, which substantiates, defines and defends realism as one of the most positive ways to live and philosophize. This book began as a series of papers on ancient Greek and modern philosophy written in 1995-97 while I was a Ph.D. student at the Philosophy Department of the University of Edinburgh, Scotland. I am indebted to my supervisors Prof. Theodore Scaltsas and Basileios Kyrkosfor their valuable instruction. Some of the material of this book is drawn also from papers and short studies I have published in the past.