Because they are chiefly domestic conflicts, civil wars have been studied primarily from a perspective stressing domestic factors. We ask, instead, whether (and how) the international system shapes civil wars; we find that it does shape the way in which they are fought—their “technology of rebellion.” After disaggregating civil wars into irregular wars (or insurgencies), conventional wars, and symmetric nonconventional wars, we report a striking decline of irregular wars following the end of the Cold War, a remarkable transformation of internal conflict. Our analysis brings the international system back into the study of internal conflict. It specifies the connection between system polarity and the Cold War on the one hand and domestic warfare on the other hand. It also demonstrates that irregular war is not the paradigmatic mode of civil war as widely believed, but rather is closely associated with the structural characteristics of the Cold War

This article explores the impact of war-related traumatic experiences on political identities and political behavior by exploring different pieces of empirical evidence from the Spanish Civil War (1936–39), the Franco dictatorship (1939–75), and its aftermath. On one hand, the author analyzes semistructured interviews of survivors of the civil war and the dictatorship; on the other hand, she assesses data from a specialized survey implemented on a representative sample of the Spanish population. The analyses broadly suggest that, controlling for family leanings during the civil war, victimization experiences during the civil war and the subsequent dictatorship lead to the rejection of the perpetrators’ identities along the political cleavage that was salient during the war (i.e., left–right). The survey analysis also indicates that (1) although grudges related to severe wartime violations are transmitted through generations, moderate wartime violations do not have such a long-term political impact; (2) the political effects of victimization do not increase with proximity to the traumatic events (i.e., age); and (3) victimization experiences do not have a significant impact on identities along cleavages that were not salient during the war (i.e., center–periphery).

Recent research on violence against civilians during wars has emphasized war‐related factors (such as territorial control or the characteristics of armed groups) over political ones (such as ideological polarization or prewar political competition). Having distinguished between irregular and conventional civil wars and between direct and indirect violence, I theorize on the determinants of direct violence in conventional civil wars. I introduce a new data set of all 1,062 municipalities of Catalonia during the Spanish Civil War (1936–1939) and I show that the degree of direct violence against civilians at the municipal level goes up where prewar electoral competition between rival political factions approaches parity. I also show that, following the first round of violence, war‐related factors gain explanatory relevance. In particular, there is a clear endogenous trend whereby subsequent levels of violence are highly correlated with initial levels of violence. In short, the paper demonstrates that an understanding of the determinants of violence requires a theory combining the effect of political cleavages and wartime dynamics.

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