When in 1973 this book was written, Emilio Betti and Giovan Battista Vico were almost unknown even within the places of High Learning, like the Colleges and the Universities. No better sort had been obtained by semi imported German scholars like Martin Heidegger and Georg Gadamer. Vico was officially introduced to America by Giorgio Tagliacozzo, the founder of Vico Studies journal, the product of Vico Institute of New York and Emory University, Department of Philosophy. These agencies, however, flourished from the1980' and continued through the first decade of the 21st century. If we include, within our present consideration, the decade of the 1970s, then we can say that for the last four decades the philosopher of Naples, Vico, constituted with his own ideas about history and the nature of nations the background of the thought of Betti's theory of hermeneutics and also a challenging obstacle to the theories of Heidegger, Heidegger's disciples and Georg Gadamer. Even though Betti during this interval of forty years, thanks also to Richard Palmer's publications, has become much more known and discussed by scholars in various field of studies and in different languages, we believe that our book by showing the true roots of Betti's grown hermeneutic tree offers unexpected insights and analysis. This book, having been a doctoral thesis in its first format, has been known only by two or three individuals and then, after a copy reached the Library of Congress, has been almost forgotten. CreateSpace made possible its publishing by my repeating on the track of the old Remington Typewriter with my Ausus computer the long walk with my older fingers. I did it more for my own pleasure and ego and for a celebration of Vico and Betti to which I wish to return in my studies. I recommend the reading of the Content of this book together with the Index; they will be available for download.