The size of war, structural and geopolitical contexts, and theory building/testing∗

Abstract

The appeal of differentiating between small and big wars is limited if the question is restricted to the utility of inductive indicators of war size in isolating some phenomenon of interest. However, there is considerable theoretical justification for treating systemic wars as a special war category. Historical‐structural emphases on geopolitical and macrostructural dynamics have led to the development of contextually specific theories that do not lend themselves readily to the explanation of all interstate wars. Examination of the cyclical fluctuations in the concentration of sea power and land power over the past 500 years help illustrate this general point. Thus, to the extent that systemic wars require a different type of explanation than do non‐systemic wars, the appropriate specification of the dependent war variable is an inescapable necessity.