In their seminal study “Resort to Arms,” Small and Singer (1982) defined a civil war as “any armed conflict that involves (a) military action internal to the metropole, (b) the active participation of the national government, and (c) effective resistance by both sides.” Internationalized civil wars constitute a newer classification, denoting a conflict involving organized violence on two or more sides within a sovereign state, in which foreign elements play a role in instigating, prolonging, or exacerbating the struggle. Small and Singer defined civil war as one in which a “system member” intervenes into a substate conflict involving organized violence. Although Singer and Small conceived “system members” narrowly as external sovereign states engaged in military intervention into the civil war in question, the definition has since been expanded by the Peace Research Institute Oslo (PRIO) and Uppsala Conflict Data Program (UCDP) to include other foreign actors—such as nonstate or private actors, diasporas, IOs, corporations, or cross-border kin groups—any of which can intervene to intensify a domestic civil conflict. From superpower interventions during the Cold War to more recent conflicts in Syria and Ukraine, internationalized civil wars have garnered increasing scholarly attention, primarily because they tend to be far bloodier and more protracted than noninternationalized civil wars. How to end such wars is a problem long bedeviling the international community. Civil wars are already more difficult to end than interstate wars partly because there are more players to satisfy in civil war settings, with multiple conflict parties coexisting on a single territory, and multiple factions within each conflict party—each constituting a “veto player” that might plausibly spoil a peace agreement should the agreement not satisfy their needs. This problem is exacerbated by an order of magnitude when a civil war becomes internationalized. When outside actors get involved in a civil war, the number of veto players rises correspondingly to include not only domestic players and internal factions, but also the involved external players, which may include foreign governments, diaspora groups, foreign fighters, and/or transnational social networks. Managing or ending internationalized civil wars is thus a highly complicated balancing act requiring attention not just to internal, but also to external veto players represented by all involved parties both inside and outside the conflict state. The traditional methods of conflict management involve electoral engineering, power-sharing arrangements, or other peace deals that seek to satisfy the aspirations of involved internal parties, while ensuring that the peace deal is “self-enforcing.” This means that it will hold up even in the absence of outside pressure. In internationalized civil wars, however, conflict managers must also satisfy involved outside actors or otherwise neutralize external conflict processes. There are multiple methods for doing this, ranging from effective border control in cases of conflict spillover to decomposing internationalized conflicts into civil and international conflicts, which are solved separately, to outright peace enforcement involving international security guarantees.
Erin K. Jenne and Milos Popovic
Etel Solingen and Peter Gourevitch
The centrality of domestic coalitions serves as transmission belts between the domestic and international realms. Despite its long lineage in international and comparative political economy and its relevance to the understanding of contemporary responses to globalization, coalitional analysis has been typically neglected when explaining outcomes in international relations. The analytical framework adopted here builds on two “ideal-typical” coalitions—an “inward-nationalist” and an “outward-internationalist” model—each advancing competing models across industrialized and industrializing contexts alike. Several applications illustrate the breadth and scope of this framework, spacious enough to explain economic responses in Europe from the repeal of the Corn Laws to the 20th century; the security implications of economic responses leading to World War I; the impact of internationalization on regional orders in the industrializing world since 1945; the relationship between coalitional approaches to the global economy and nuclear weapons proliferation since 1970; and the relevance of coalitional divides to outcomes regarding Brexit, Donald Trump’s election, and beyond. Coalitional analysis thus (a) offers important insights on wide-ranging empirical phenomena in comparative and international politics that institutional approaches alone fail to explain; (b) provides a unifying framework addressing trans-historical responses to globalization, nationalism, ethno-confessionalism, and their effects on interstate relations; (c) attends to political cleavages in political economy that intersect with security; (d) transcends dated level-of-analysis categories by linking subnational and global processes; (e) is flexible enough to accommodate wide variation in state–society relations and political institutionalization; (f) grounds politics in a dynamic framework able to explain both continuity and change; and (g) clarifies contradictory findings regarding interdependence and war by providing a mechanism explaining why, when, and how economic exchange with the world may or may not inhibit war.