Book excerpt: The fall of the Berlin Wall and the disintegration of the Soviet Union were only two of the many events that profoundly altered the international political system in the late 1980s and early 1990s. In a world no longer dominated by Cold War tensions, nation states have had to rethink their international roles and focus on economic rather than military concerns. This book examines how two middle powers, Australia and Canada, are grappling with the difficult process of relocating themselves in the rapidly changing international economy. The authors argue that the concept of middle power has continuing relevance in contemporary international relations theory, and they present a number of case studies to illustrate the changing nature of middle power behaviour.