This work tries to bridge the gap between international lawyers and those political scientists who write about international politics. In the first part, the author discusses the influence of Professor Morgenthau's realist school on the current thinking of political scientists and the abandonment of this school by its originator in the last years of his life. The author concludes that the best way to test the validity of different approaches is to discuss various international crises in the light of contrasting theories and to analyze each situation from both the legal and political points of...