David F. Mitchell and Jeffrey Pickering
The empirical literature on arms buildups and the use of interstate military force has advanced considerably over the last half century. Research has largely confirmed that a relationship exists between arms buildups and the subsequent use of force, although it is historically contingent. The relationship seems to have existed in some earlier historical periods but has not been a feature of international politics since 1945. Broader work such as the steps-to-war model brings understanding to such variation by demonstrating how arms races are interrelated with other causes of conflict, such as territorial disputes and alliances. Still, many important dimensions of the arms race–conflict connection remain to be explored. Differences between qualitative and quantitative arms races, for example, have not received sufficient empirical scrutiny. Precise theory also needs to be developed on direct and indirect relationships between arms races and conflict, and such theory requires empirical investigation.
Christopher J. Fettweis
The study of international relations has always been multidisciplinary. Over the course of the last century, political scientists have borrowed concepts, methods, and logic from a wide range of fields—from history, psychology, economics, law, sociology, anthropology, and others—in their effort to understand why states act as they do. Few of those disciplines contributed more to the course of 20th-century international relations scholarship than geography. As the layout of the chessboard shapes the game, so do the features of the Earth provide the most basic influence upon states. That geography affects international relations is uncontroversial; what is not yet clear, however, is exactly how, under what conditions, and to what extent. After all, a board can teach only a limited amount about the nature of a game.
Many theories of state behavior involve several ceteris-paribus assumptions about the setting for international interaction, even if the substantial variation in geographical endowments assures that all things will never be equal. Some states are blessed (or cursed) with a rich supply of natural resources, good ports, arable land, and temperate climate; others struggle with too little (or too much) rainfall, temperature extremes, mountain ranges or deserts, powerful neighbors, or lack of access to the sea. While the number of studies examining the effects of the constants of geography on state behavior may pale in comparison to those that focus on the variables of human interaction, international relations has not been silent about geography. What insights have come from the many investigations into the relationship between the game of international politics and the board it is played on, the surface of the Earth?
Rebecca Katz, Erin Sorrell, and Claire Standley
The last 30 years have seen the global consequences of newly emerging and re-emerging infectious diseases, starting with the international spread of HIV/AIDS, the emergence of Ebola and other hemorrhagic fevers, SARS, MERS, novel influenza viruses, and most recently, the global spread of Zika. The impact of tuberculosis, malaria, and neglected tropical diseases on society are now better understood, including how these diseases influence the social, economic, and political environment in a nation. Despite international treaties and norms, the specter of intentional use of infectious disease remains present, particularly as technological barriers to access are reduced. The reality is that infectious diseases not only impact population health, but also have clear consequences for international security and foreign policy.
Foreign policy has been used to coordinate response to infectious disease events and to advance population health around the world. Conversely, collaboration on infectious disease prevention, preparedness, and response has been used strategically by nations to advance diplomacy and improve foreign relations. Both approaches have become integral to foreign policy, and this chapter provides examples to elucidate how health and foreign policy have become intertwined and used with different levels of effectiveness by governments around the world. As the scope of this topic is extensive, this article primarily draws from U.S. examples for brevity’s sake, while acknowledging the truly global nature of the dynamic between infectious diseases and foreign policy, and noting that the interplay between them will vary between countries and regions.
In 2014, U.S. President Barak Obama called upon global partners to, “change our mindsets and start thinking about biological threats as the security threats that they are—in addition to being humanitarian threats and economic threats. We have to bring the same level of commitment and focus to these challenges as we do when meeting around more traditional security issues”. With world leaders increasingly identifying disease as threats to security and economic stability, we are observing infectious diseases—like no other time in history—becoming an integral component of foreign policy.
Ekim Arbatli and Cemal Eren Arbatli
Why do coups d’état happen? Although many studies have investigated this question, they pay relatively little attention to the international causes and ramifications of coups. Especially, empirical studies on the external determinants of coup risk and outcomes still remain limited. There are two current lines of research in this direction. The first line studies international linkages and coup risk, looking at the external determinants of coups: regional spillover effects, foreign linkage, and foreign leverage. A promising angle on this front is focusing on the role of post-coup reactions from international actors to illuminate how coup plotters shape their incentives under outside pressure. The second line of research investigates interstate conflict and coup risk, considering diversionary behavior and external threats as potential coup-proofing strategies. In this effort, studying the relationship between external threat environment and coup risk can be fruitful, whereas empirical tests of the classical diversionary war theory will yield relatively marginal contributions.
Currently, three issues stand out in the empirical coup literature that should be further addressed by scholars. First is the need for more extensive and systematic data collection efforts to obtain detailed information about the identities, targets, and motives of coup perpetrators. Second, the external sources of leader insecurity beyond interstate conflicts remain an underexplored area. Third, although many studies have tried to determine when coup attempts happen, scholarly knowledge of when and how they succeed remains very limited. More work is needed to uncover the determinants of coup success across different regimes and leader survival scenarios.
Erin K. Jenne and Milos Popovic
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.
Risa A. Brooks
The protests that began in Tunisia in December 2010, and quickly spread across the Arab world, have drawn significant attention to the impact of militaries and coercive institutions on protests and revolutionary movements. The actions of the militaries were a central determinant of the outcomes of the uprisings of 2010–2011. In Tunisia and Egypt the decision by military leaders to abstain from using force on mass protests to suppress them led to the downfall of the countries’ autocrats. In Syria and Bahrain, militaries defended political leaders with brutal force. In Yemen and Libya, militaries fractured, with some units remaining allied to the leader and using force on his behalf and others defecting. In still other states, leaders and militaries were able to forestall the emergence of large, regime-threatening protests.
To explain these divergent outcomes, scholars and analysts have looked to a variety of explanatory factors. These focus on the attributes of the militaries involved, their civil-military relations, the size and social composition of the protests, the nature of the regime’s institutions, and the impact of monarchical traditions. These explanations offer many useful insights, but several issues remain under-studied. These include the impact of authoritarian learning and diffusion on protest trajectory. They also include the endogeneity of the protests to the nature of a country’s civil-military relations (i.e., how preexisting patterns of civil-military relations affected the possibility that incipient demonstrations would escalate to mass protests). Scholars also have been understandably captivated by the aforementioned pattern of military defection-loyalty, focusing on explaining that observed difference at the expense of studying other dependent variables. The next generation of scholarship on the uprisings therefore would benefit from efforts to conceptualize and investigate different aspects of variation in military behavior.
Overall, the first-generation literature has proved enormously useful and laid the foundation for a much richer understanding of military behavior and reactions to popular uprisings in the Arab world and beyond.
Zachary C. Shirkey
Military intervention into interstate and civil wars is both common and important. It lengthens wars, makes them more severe, and shapes how they are fought. Even the mere possibility of intervention can alter the course of a war as belligerent powers alter their strategies to either encourage or dissuade potential interveners. These effects of military intervention are found in both civil and interstate wars. Yet, is state intervention into interstate and civil wars essentially one phenomenon or are they distinct phenomena? By looking at which states are likely to intervene, why and when they intervene, and which wars are most likely to experience intervention, it becomes clear the similarities between state military intervention into civil and interstate wars are more significant than are the differences. In other words, despite some important differences, they are subsets of the same phenomenon. In both types of wars, allies, geographically proximate states, and great powers are more likely to intervene. Also, information revealed by events within both types of wars prompts intervention and explains its timing. Last, wars in which international organizations become involved, both civil and interstate, are more likely to experience intervention. There are, however, important differences notably in the areas of cross-border ethnic ties, the presence of great powers in the war, the use of non-state proxies, and wars caused by commitment problems.
Philip G. Roeder
National secession seeks to create a new sovereign state for a nation residing on its homeland that is currently located inside another sovereign state. This goal distinguishes national secession from regional secession, autonomy, and decolonization and shapes the strategies, operational objectives, and tactical choices of the leaders of national-secession campaigns. Explanations for the success of some campaigns—particularly, success at getting on the global agenda—have focused on the identities, grievances, or greed of their members. Explanations for why some campaigns have turned to protracted intense violence have focused on these motivations and on tactical-logistical opportunities.
The existing literature suffers from its failure to agree on theoretical and conceptual fundamentals. As a consequence, empirical studies focus on very different universes of cases and operationalize key variables in diverging ways. The existing literature frequently does not consider how the goal of national secession constrains the strategies, operations, and tactics of such campaigns. And so, it often fails to consider whether studies with another dependent variable can be extended to the study of national secession. Explanations stress indeterminate or substitutable causes and remote constraints on most national-secession campaigns—causes and constraints taken “off the shelf” from theories about conflicts operating under very different strategic and operational constraints. Missing from these explanations is the authenticity and realism of the programs for national secession in the assessments of the populations that each program presents as a nation with a right to a sovereign state of its own. Explanations and recommendations for responses by common-state governments, their allies, and the international community often fail to understand the centrality of the war of programs between national secessionists and common-state governments and the ways this constrains what compromises are possible and what responses are most likely to lead to domestic and international peace in such conflicts.
Niklas Swanström and Christina Wenngren
Transnational organized crime is part and parcel of the modern, globalized economy. The black market has irrefutable influence over both economic and political structures. It corrodes, corrupts, and coopts the institutions with which it comes into contact. Features that arise as a side effect of organized criminal activity also impact economic, social, and political developments. Isolated approaches aimed at counteracting criminal networks have proved ineffective, necessitating a fresh perspective on foreign policy-based solutions.
A central difficulty of researching organized crime is the opaque nature of criminal networks, whose members prefer to operate in the shadows. The underworld does not owe accountability to any outsiders, nor do crime syndicates generally file tax returns. International bodies like the United Nations Office on Drugs and Crime are forced to rely on the reports of member states, which are often subject to distortion. This makes accurate assessment of the extent and impact of organized crime difficult, to say the least.
Part of what makes the black market difficult to combat is the malleable approach of criminal networks. They employ a variety of strategies to pursue their illicit activity and will quickly adapt to the given strength or weakness of their host state. These strategies manifest themselves as either evasion, confrontation, or infiltration of state institutions. All of these strategies undermine legitimate sociopolitical structures, making it imperative to implement effective foreign policy initiatives that fight the trade as a whole.
Sabine C. Carey and Neil J. Mitchell
Pro-government militias are a prominent feature of civil wars. Governments in Colombia, Syria, and Sudan recruit irregular forces in their armed struggle against insurgents. The United States collaborated with Awakening groups to counter the insurgency in Iraq, just as colonizers used local armed groups to fight rebellions in their colonies. An emerging cross-disciplinary literature on pro-government non-state armed groups generates a variety of research questions for scholars interested in conflict, political violence, and political stability: Does the presence of such groups indicate a new type of conflict? What are the dynamics that drive governments to align with informal armed groups and that make armed groups choose to side with the government? Given the risks entailed in surrendering a monopoly of violence, is there a turning point in a conflict when governments enlist these groups? How successful are these groups? Why do governments use these non-state armed actors to shape foreign conflicts whether as insurgents or counterinsurgents abroad? Are these non-state armed actors always useful to governments or perhaps even an indicator for state failure?
We examine the demand for and supply of pro-government armed groups and the legacies that shape their role in civil wars. The enduring pattern of collaboration between governments and these armed non-state actors challenges conventional theory and the idea of an evolutionary process of the modern state consolidating the means of violence. Research on these groups and their consequences began with case studies, and these continue to yield valuable insights. More recently, survey work and cross-national quantitative research contribute to our knowledge. This mix of methods is opening new lines of inquiry for research on insurgencies and the delivery of the core public good of effective security.