Some contemporary ‘English School’ theorists have moved away from the traditional approach of Martin Wight and Hedley Bull,who emphasized the role of ideas, norms, and values in IR,and closer to the social science approach to IR exemplified by the work of Kenneth Waltz, which emphasize international structure. Barry Buzan seeks to develop a more sophisticated analysis of the structure of international society. By ‘structure’ is meant the encompassing framework and underlying foundation of international relations, the very basis of the existence of either an international system or an international society. For Waltz,international structure was the underpinning power relation of sovereign states. For Buzan international structure is sustained by a number of ‘primary institution’ of international society. The master institutions are; sovereignty;territoriality;diplomacy;great power management; equality of people; market; nationalism; and environmental stewardship. It is clear that a full analysis of these institutions and their interplay is a demanding task; the concluding chapter of his book is a first attempt at such an investigation.