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Article

The study of political campaigns is very varied in the political science literature. On the one hand, campaigns can involve groups of citizens working together on a local issue of concern to them, such as preventing an airport expansion from threatening their community. Only a relatively few people are likely to be actively involved and the goals of such a campaign are fairly clearly defined and limited. At the other end of the scale a campaign can consist of a broad social movement that is trying to influence public opinion and bring about changes in public policies on really big issues like climate change and global warming. Large numbers of people are likely to be involved and the goals are broad and ambitious. In between these two extremes, a whole range of campaigns with different objectives and strategies are to be found in contemporary democracies. This article focuses on election campaigns which are in an intermediate position between these two. Early research suggested that such campaigns were not very important but subsequent research shows that they are influential both in increasing turnout and changing the party choices that individual electors make.

Article

Theories of civil war focus largely on factors internal to countries, generally ignoring the systemic effects of superpower rivalry during the Cold War, or great power politics associated with regional rivalries and ambitions. The question of the importance of proxiness of civil wars potentially challenges notions of commitment and time-inconsistency problems associated with explanations of why rational agents fail to find less costly bargains compared with fighting costly wars. Great powers often influence the politics of lesser powers by supporting sides in contentious politics as a means to achieve foreign policy objectives relatively cheaply. Models of civil war that focus exclusively on in-country ills, thus, would have very limited predictive power. It is argued here that great powers influence the politics of other nations without bearing the costs of direct involvement by supplying the logistics that allow the feasibility of rebellions. Examining these issues is all the more critical today because the multipolar world emerging out of the Cold War era promises to generate proxy struggles in many strategic places. While the study of civil war moves in the direction of disaggregating in order to understand micro processes associated with rebellion, it might be prudent to examine the interplay of factors between the micro and macro processes in multilevel models because the feasibility of fighting over not fighting is likely to be decided at higher rather than lower levels of aggregation. How to cauterize great-power machinations in civil war must in turn become a primary focus of international institutions, such as the United Nations, for strengthening instruments that would curtail external influences that propagate civil wars.

Article

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?

Article

Once ended, a significant number of civil wars recur. One influential empirical international relations theory on which scholars have drawn in an effort to provide an explanation for this phenomenon is the bargaining model of war. Devised initially for the study of interstate war, the theory posits that bargaining problems may prevent belligerents from reaching a deal that enables them to avoid a costly war. Bargaining problems also have been identified as contributing to the recurrence of armed intrastate conflict. Working within the framework of bargaining theory, a number of scholars have claimed that the most effective way to inhibit a return to civil war is to end the conflict via military victory as such an outcome is thought to help solve key bargaining problems. However, a growing number of empirical tests cast doubt on this proposition. An analysis of the results of these tests as well as new scholarship on civil war termination highlight some of the limitations inherent in employing a theory devised for the study of interstate war to analyze questions related to civil wars.

Article

Empirical research on civil war onset has been largely dominated by two approaches: a correlational or “correlates of civil war” approach which seeks to identify country-level characteristics associated with a higher likelihood of civil war outbreak, and a bargaining approach which starts from the assumption that warfare is costly and which views civil conflict as a by-product of bargaining failures. Correlational and bargaining studies of internal conflict onset have reached an analytical plateau because they fail to specify the precise mechanisms that yield civil warfare instead of a different type of violent or nonviolent outcome. An alternative, contentious framework is advanced for studying civil war onset. This framework situates the conflict event within a larger cycle of contention and specifies the mechanisms through which civil conflict is most likely to occur. According to this contentious perspective, civil wars are commonly produced by the combination of one structural condition—a state crisis of authority and/or legitimacy—and the interdependent effect of two mechanisms—radicalization and militarization. Through theory development and vignettes from a handful of civil war cases, the article makes the case that the contentious approach holds promise for elucidating how exactly civil conflicts break out. Despite holding initial explanatory power, the contentious theory of civil war onset advanced herein awaits more systematic empirical testing.

Article

A central cleavage in the war making-state making literature is between advocates of the notion that warfare has been the principal path to developing stronger states and critics who argue that the relationship no longer holds, especially in non-European contexts. It is suggested that the problem is simply one of theoretical specification. Increasingly intensive warfare, as manifested in European combat, made states stronger. Less intensive warfare, particularly common after 1945, is less likely to do so. Empirical analysis of a more representative data set on state capacity (revenues as a proportion of gross domestic product [GDP]), focusing on cases since 1870, strongly supports this point of view. The intensiveness of war is not the only factor at work—regime type and win/loss outcomes matter as well—but the relationship does not appear to be constrained by the level of development.

Article

A major challenge for countries that emerge from civil war is the stabilization of the post-conflict order in a way that fighting does not break out again. Recent empirical and theoretical work on the resolution of civil wars and on the duration of peace strongly rely on the bargaining framework of war emphasizing information asymmetries and commitment problems as main reasons for why in some states civil wars recur repeatedly, whereas in other societies a conflict ends and a transition to a peaceful society is successful. The length of peace spells depends partly on information about the distribution of power that became available during the conflict, captured by the duration and intensity of the fighting as well as the type of conflict ending. Information problems are more relevant at earlier stages and with regard to the initiation of negotiations. In finding bargaining deals and securing their implementation, the conflict parties have to overcome commitment problems. The literature has investigated in more detail third-party security guarantees and power-sharing arrangements as mechanisms to get conflict parties to credibly commit to and adhere to a negotiated agreement. Recently, empirical research moved beyond the conclusion of peace agreements to the study of their implementation. Particular challenges for a peaceful order are the demobilization of ex-combatants, which is aggravated by time-inconsistency problems, the timing of elections, and the redistribution of economic resources. Finally, solutions become more difficult in multiparty conflicts and if the armed groups are fragmented.

Article

Contrary to common assumption, major forms of large-scale organized political violence in sub-Saharan Africa have declined in frequency and intensity, and the region is not uniquely prone to the onset of warfare. African civil wars in the 2000s and 2010s are less common compared to the mid-1990s. The character of warfare has also changed. Contemporary wars are generally small-scale, fought on state peripheries and increasingly across multiple states, and involve factionalized insurgents who typically cannot hold significant territory or capture state capitals. Episodes of large-scale mass killing of civilians are also on the decline. That said, other forms of political violence that receive less attention in the academic literature are increasing or persistent. These include electoral violence and violence over access to livelihood resources, such as land and water. Geopolitical shifts since the end of the Cold War are a leading candidate to explain the changing frequency and character of warfare in sub-Saharan Africa. New global priorities, including changes in external state funding opportunities for insurgents, an emphasis on change through elections, investments in conflict mediation strategies, and the rise of China are hypothesized as critical factors shaping the new patterns of warfare.

Article

Once a civil war ends, there is high probability that the nation will relapse into renewed war within a few years. For a nation where a civil war has recently ended to relapse into renewed conflict, some dynamic process of contention must emerge that makes a resumption of armed conflict one—but not the only—possible outcome of that contentious episode. We can conceive of the dynamics by which contentious politics can lead to civil war recurrence as a function of three conditions. First, one or more dissident groups must emerge with the organizational and military capacity to mount and sustain an armed challenge to the postwar state. Second, one or more of those groups must have the incentive to resort to armed conflict rather than abide by the post–civil war order. Third, conditions and events in the postwar environment must evolve in a manner such that one or more of these groups must determine that they have an opportunity to revolt. This framework can be used to analyze how, in existing research, the outcome and key attributes of the now-ended civil war and conditions in the postwar environment affect whether dissident groups will resume armed conflict or sustain the peace.

Article

What explains war? The so-called bargaining approach has evolved quickly in the past two decades, opening up important new possibilities and raising fundamental challenges to previous conventional thinking about the origins of political violence. Bargaining is intended to explain the causes of conflict on many levels, from interpersonal to international. War is not the product of any of a number of variables creating opportunity or willingness, but instead is caused by whatever factors prevent competitors from negotiating the settlements that result from fighting. Conflict is thus a bargaining failure, a socially inferior outcome, but also a determined choice. Embraced by a growing number of scholars, the bargaining perspective rapidly created a new consensus in some circles. Bargaining theory is radical in relocating at least some of the causes of conflict away from material, cultural, political, or psychological factors and replacing them with states of knowledge about these same material or ideational factors. Approaching conflict as a bargaining failure—produced by uncertainty and incentives to misrepresent, credible commitment problems, or issue indivisibility—is the “state of the art” in the study of conflict. At the same time, bargaining theories remain largely untested in any systematic sense: theory has moved far ahead of empirics. The bargaining perspective has been favored largely because of compelling logic rather than empirical validity. Despite the bargaining analogy’s wide-ranging influence (or perhaps because of this influence), scholars have largely failed to subject the key causal mechanisms of bargaining theory to systematic empirical investigation. Further progress for bargaining theory, both among adherents and in the larger research community, depends on empirical tests of both core claims and new theoretical implications of the bargaining approach. The limited amount of systematic empirical research on bargaining theories of conflict is by no means entirely accident or the product of lethargy on the part of the scholarly community. Tests of theories that involve intangible factors like states of belief or perception are difficult to pursue. How does one measure uncertainty? What does learning look like in the midst of a war? When is indivisibility or commitment a problem, and when can it be resolved through other measures, such as ancillary bargains? The challenge before researchers, however, is to surmount these obstacles. To the degree that progress in science is empirical, bargaining theory needs testing. As should be clear, the dearth of empirical tests of bargaining approaches to the study of conflict leaves important questions unanswered. Is it true, for example, as bargaining theory suggests, that uncertainty leads to the possibility of war? If so, how much uncertainty is required and in what contexts? Which types of uncertainty are most pernicious (and which are perhaps relatively benign)? Under what circumstances are the effects of uncertainty greatest and where are they least critical? Empirical investigation of the bargaining model can provide essential guidance to theoretical work on conflict by identifying insights that can offer intellectual purchase and by highlighting areas of inquiry that are likely to be empirical dead ends. More broadly, the impact of bargaining theory on the study and practice of international relations rests to a substantial degree on the success of efforts to substantiate the perspective empirically.

Article

Pellumb Kelmendi and Amanda Rizkallah

Civil war is one of the most devastating and potentially transformative events that can befall a country. Despite an intuitive acknowledgment that civil war is a defining political moment in a state and society’s history, we know relatively little about the legacies of wartime social and political processes on post-war political development. Scholars and practitioners have written extensively on the effects of different war endings and international interventions on post-war political outcomes—particularly as they concern the maintenance of security and stability. However, this scholarship has tended to treat the wartime period as a black box. Until recently, this bias has precluded systematic efforts to understand how the wartime political and social processes and context preceding international interventions and peace agreements have their own autonomous effects on post-war politics. Some of these processes include regional and local patterns of mobilization, armed group structure, political polarization, and violence, among others. Focusing more closely on the post-war effect of variation in wartime processes can not only improve our existing understanding of outcomes such as peace duration and stability but can also improve our understanding of other political development outcomes such as democratization, party building, local governance, and individual political behavior and participation. However, some scholars have started investigating the effect of wartime processes on post-war political development at three broad levels of analysis: the regime, party, and individual levels. At the regime level, democratization seems most likely when the distribution of power among warring parties is even and in contexts where armed actors find it necessary to mobilize ordinary citizens for the war effort. The transition from armed group to peacetime party has also received attention. Armed groups with sustained wartime territorial control, strong ties with the local population, centralized leadership, and cohesive wartime organizations are most likely to make the transition to post-war party and experience electoral success. Moving beyond case studies to more comparative work and giving greater attention to the precise specification of causal mechanisms would continue moving this research agenda in a productive direction. In addition, some scholars have examined individual behavior and attitudes after civil war. A central finding is that individuals who experience victimization during civil war are more likely to engage in political participation and local activism after the war. Future research should go beyond victimization to examine the effects of other wartime experiences. Harnessing the insights of the rich literature on the dynamics of civil war and the parallel advances in the collection of micro-level data is key to advancing the research on wartime origins of post-war political development. Such progress would allow scholars to speak to the larger question of how state and society are affected and transformed by the process of civil war.

Article

The literature on international hierarchy is emerging as a progressive research program. This new theory of international relations is generating novel propositions that are being empirically confirmed. Some propositions, like the hierarchical peace, provide new explanations for previously identified phenomena. Other propositions on defense spending, crisis joining,e trade, and civil wars and repression establish new empirical relationships that—if they are not actually inconsistent with existing theories—were not previously identified. If the measure of progress is the uncovering of new facts, the new hierarchy studies are clearly moving in the right direction. Further progress requires more and better measures of hierarchy and continued testing of propositions derived from the theory.

Article

The relationship between civil war and religion is a complex one. Civil wars are influenced in many different ways by religiously based factors. Different religiously based factors influence the onset, dynamics, and termination of civil wars. Religious factors have been examined both as causes of war and their dynamics and as factors behind how violence is prevented, conflict is managed, and peace is built. Whereas research on peace and conflict has often tended to neglect religiously focused explanations in favor of explanations based on strategic, economic, or other factors, research on religion and conflict has seen a resurgence in recent years. Research can be organized based on three different levels of analysis: (a) explanations relating to the religious group level, (b) explanations relating to the level of interrelationships between different religious groups, and (c) explanations relating to the level of the group’s relationship to the state. On the group level, religious beliefs, religious practices, religious constituency, and religious institutions play a role. On the intergroup level, two main debates center around the “clash of civilization” and religious demography. On the state-religion level, religious grievances and state favoritism can be seen as explanations for civil wars. As religiously defined conflicts are becoming more common, understanding more about the conditions under which religious factors influence civil wars’ onset, dynamics, and termination is vital.

Article

Religion has historically played a central role in motivating rulers to start and individuals to participate in war. However, the decline of religion in international politics following the Peace of Westphalia and the inception of the modern nation-state system, which built and highlighted a sense of national identity, undermined the contribution of religion to politics and consequently, conflict. The case of the Iran−Iraq War, however, shows a different pattern in which religion did play a crucial role in motivating individuals to participate in war. Although the evidence suggests that religious motivations by no means contributed to Saddam’s decision to launch the war, an overview of the Iranian leaders’ speeches and martyrs’ statements reveals that religion significantly motivated people to take part in the war. While Iraqi leaders tried to mobilize the population by highlighting the allegedly Persian-Arab historical antagonism and propagating an Iraqi-centered form of Arab nationalism, Iranian leaders exploited religious symbols and emotions to encourage war participation, garner public support, alleviate the suffering of the people, and build military morale. The Iranian leadership painted the war as a battle between believers and unbelievers, Muslims and infidels, and the true and the false. This strategy turned out to be an effective tool of mobilization during wartime.

Article

A significant, if minority, current in contemporary international relations scholarship places regions at the center of analysis. In practice, the shift to the regional level of analysis serves several purposes within international relations scholarship. Within the sociology of the discipline, regionalism provides a theoretical justification for work that in earlier periods would have been associated with traditional area studies. Within the broader international relations literature, a regional focus allows for a more nuanced analysis of war and peace outside of the core great power conflicts at the center of traditional analysis. In particular, regional approaches remind us that conflict at the regional level is driven more frequently by local than by global concerns while providing a framework for studying important conflicts that are not simply a manifestation of great power rivalries. Finally, this approach is essential for answering questions that can be couched only at the regional level of analysis. At a narrow level, regional approaches are particularly useful for specifying the dangers of conflict spillover and the actors who are most vulnerable to such spillover. At the broadest level, regional conflict systems become the unit of analysis for work examining why some regions are more peaceful than others and how violent regions may transition to peace. A good understanding of these questions has implications both for policymakers seeking to advance national interests and for peacemakers seeking a solution to violence.

Article

Civil wars in the contemporary world are deeply interpenetrated by international influences. There are six different conceptions of the international system and their effects on civil conflicts: (1) the realist conception and the superpower interventions of the Cold War period, (2) the liberal institutional conception and the diplomatic mediation of the United Nations, (3) global cultural influences such as world religions, democratization and education, (4) the global economy and structural poverty, (5) transnational bilateral relations with neighboring states, and (6) the planetary ecosystem and the effects of climate change. Taken together, these international influences have a weighty effect on the conduct and duration of contemporary civil wars.

Article

Wolfgang Wagner

Parliaments differ enormously in their foreign policy competences. This is best documented in the area of “war powers,” understood as decision-making on the use of force. In other issue areas, such as treaty-making, defense budgets, sanctions, or arms exports, differences across countries are far less researched. The available data, however, suggests that differences in those areas are no smaller than in the area of war powers. What is more, the data also show that parliamentary competences across issue areas within particular countries also differ a lot. Parliaments are not strong or weak across the full spectrum of foreign policy competences. Instead, parliamentary competences are country, as well as issue specific. A general trend toward a parliamentarization or deparliamentarization of foreign affairs is not discernible. Partly inspired by institutionalist versions of Democratic Peace Theory, numerous studies have examined whether parliamentary powers have any effect on countries’ propensity to use armed force. Case-study research tends to find that variation in parliamentary powers impacts on decision-making on the use of force but also emphasizes that the effects of institutional constraints need to be understood in conjunction with the preferences of the public, parliament, and government. Statistical studies have found some evidence for a “parliamentary peace,” but because of problematic indicators and a lack of controls, doubts remain as to robustness and significance of this effect. In any case, theories of legislative-executive relations in parliamentary systems suggest that open confrontations between parliament and government are exceptional. Instead of an institutional constraint in a system of checks and balances, parliamentary war powers can be understood as an additional reassurance against unpopular decisions to use force. Most studies of parliaments in foreign affairs are characterized by “methodological nationalism”—that is, the assumption that nation-states are the natural units of analysis. However, parliaments’ activities in foreign affairs are not exhausted by their monitoring and scrutiny of national executives. In addition, there is a long tradition of “parliamentary diplomacy” and engagement in interparliamentary institutions. The most powerful parliamentary actor beyond the nation-state is the European Parliament. Although its formal competences are limited, it has been very effective in using its powers to influence European foreign policy.

Article

Since the Cold War’s end, academics and policy analysts alike have described the international system as unipolar. The term’s use appears well grounded. The United States possesses exceptional relative capabilities by historical standards, with capabilities—including control of the skies—that were unimaginable under British, Dutch, Spanish, and Portuguese hegemony. The system seems unipolar then when assessed using a common method for discerning polarity: counting the number of unusually powerful countries in the system. But the numerical case for U.S. preeminence is far easier to make than a logical argument for judging the number of poles in the system. Logic actually suffers considerably when analysts base their thinking about unipolarity on the common assumptions that (a) the Cold War-era international system was bipolar, (b) the current system is unipolar, (c) polarity is discernable from aggregate capabilities, and (d) polarity is detectable in interstate behavior.

Article

Uncertainty is pervasive in international politics. This uncertainty can have many sources. Each source has different origins and implications for the likelihood of conflict. Existing theories focus on three sources: (1) uncertainty due to asymmetric information about adversary traits that affect war payoffs, (2) uncertainty about adversary intentions, and (3) fundamental uncertainty about conflict-relevant processes. Scholarship details the implications of each type of uncertainty for war and peace as well as the prospects for reducing the uncertainty. While theoretical work is quite rich, empirical studies generally lag behind due to measurement challenges and difficulties in specifying clear, testable implications. Nonetheless, using novel proxies for different forms of uncertainty has generated notable progress.

Article

Sudan has had an unstable relationship between soldiers and civilians since shortly after it came to independence in 1956. This has resulted in three military coups, in 1958, 1969, and 1989, all of which gave rise to successful, peaceful civilian resistance seeking democratic government in 1964, 1985, and 2018. In the south of the country, two lengthy civil wars started under periods of military rule and resulted in separation and the creation of South Sudan in 2011, in which the very definition of “soldiers” and “civilians” is central to continuing conflicts.