Book excerpt: "A Theory of Disfunctionality: The European Micro-states as Disfunctional States in the International System" explains the continuing survival of European micro-states as members of the international system. Micro-states are small sovereign states with populations of 1 million or less, of which there are 10 in Europe. The existence of micro-states raises a number of questions about the nature of statehood, the recognition of sovereignty, and the ability of such states to maintain a presence in international politics. This book establishes the ‘theory of disfunctionality’ in which a functional account of statehood is proposed. It is argued that the state has six functions—but the micro-states are so small that they ‘contract out’ some state functions to others in the international system. By doing this, the micro-states ensure their continuing survival in international politics. The book, which focuses on two case studies—Monaco and Luxembourg—, will be of particular interest to those involved in small state studies including scholars, students, practitioners and policy-makers, as well as those researching International Relations and state theory.