We witnessed a new school in international politics so called neo-realism after Hans Morgenthau's dead in July 1980. Kenneth Waltz – the notably scientist in IR – made some adjustments in realism produced by Morgenthau for analyzing international order and disorder in his The Theory of International Politics. In the paper could be found the differentiations between Realism and Neo- Realism in concerned with Waltz's book, so it needs to respond what is the cognitive manner and international security analyses in Neo-Realism? With the reviewing the adjustments and the presuppositions and the key concepts of Neo- Realism it is make popper condition for focus on four main ideas of it. Rethinking the essential suppositions of realism by Neo-realism, the author argues; make proper explanation in international security for regarding to dynamic nature and logics of affairs and conception.
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