This book defends realism in the study of international politics and demonstrates the heuristic and evaluative utility of Robert Berki's interpretation of political realism and political idealism. It argues that realism is not a meaningless term nor redundant and necessarily rhetorical in politics.

"This book serves three purposes, and it serves them very well. First, it patiently, accurately and comprehensively supplies the necessary information about the historical and contemporaneous ideas, views, problems and theories which constitute the conceptual setting for Sellars's theses and argumentation. Second, it provides a careful and lucid section-by-section interpretative explanation of Sellars's own principal views and claims and, crucially, undertakes to support them. And third, it offers its readers the beginnings of an engaged critical discussion of Sellars's critique of givenness and epistemological foundationalism. What is particularly impressive about this work is its marvelous clarity... a highly polished, accessible text..." -- Jay F Rosenberg, Taylor Grandy Professor of Philosophy, University of North Carolina, Chapel Hill.