One of the most notable events in world politics in the second half of the 20th century was the Soviet Union’s fall in December 1991 which profoundly changed the outlook of the global political scene and the balance of power among its key actors. This thesis studies the impacts and significance of the Soviet demise on Libyan foreign policy between 1991 and 2003. Libyan foreign policy was transformed; the thesis asks how, why and when this occurred and how the changes in foreign policy were managed. While so doing, a set of questions are raised concerning the emerging context and developments in world order which seemed to compel Libya to change its behaviour, changing its relations with the West in general and the United States in particular. Three major questions are explored in detail in this thesis. The first question relates to how and why Libya aligned with the Soviet Union. The second question addresses how and to what extent these developments in international order appeared to have affected Libya’s foreign policy behaviour. Finally, the third question sheds light on the reasons and attitudes that led to these changes in Libya’s foreign policy orientations. This is also to engage with an important literature on the scope of foreign policy of small states. It also raises questions of the role of leadership, the continuing post-Soviet relationship between Russia and Libya, the decision making processes in Libya, and the agent-structure question in international relations as it bears on the forces which brought about change in this case