Seminar paper from the year 2006 in the subject Politics - General and Theories of International Politics, grade: 1.6, The Australian National University, language: English, abstract: Contemporary theory of International Relations is a continuous scholarly battleground for various schools of thought. This paper will scrutinize two prevailing theories of neorealism and neoliberalism, namely Kenneth Waltz’s concept of political structures juxtaposed with Robert O. Keohane’s neoliberal institutionalism. To arrive at a critical conclusion that explains which of the two constructs stand a better chance of successfully explaining the most fundamental workings of the international system of states, a four-part sequence is proposed in this paper. Firstly, this paper will explain how both authors define their assumed principles and how those assumptions are summarised in relation to the international system. Secondly it will demonstrate where the author’s ideas intersect and/or divert from the other. Thirdly, it will examine if it is feasible to classify the ideas as distinct theories or if it is perhaps more accurate to see Keohane’s work as an alteration to neorealist theory. Finally, by equating the logical consequences of the findings in the preceding sections, this paper will conclude with a restrictive formulation of the more convincing idea within the confines of the two texts. Waltz commences his 1979 chapter on political structures in “Theory of International Politics” by stressing the need for a system theory of international politics, which is set apart from economic, social and other international realms. He adapts the idea of structure predominately used by economists and anthropologists. Waltz is particularly interested in the creation and interaction of the units within the system and amongst each other, as well as the forces and outcomes that the units entail. By setting aside “the characteristics of units, their behaviour, and their interactions” and focusing purely on their position within the structure instead, Waltz argues that an abstract theory of the system will more precisely explain how the structure of political systems affects the agencies, its units, thereby minimising confusion between system and unit level causalities. As Waltz continues his deductive approach to political systems he constitutes structure and interacting units.