Once the object of consensus, every aspect of the traditional account of early modern Europe as an anarchic system of sovereign states is now debated—from the existence of sovereign states to the notion of anarchy, and even the European limits of that system. In the context of these disagreements, I develop a new account of international order in early modern Europe grounded in the perceptions of historical actors. I first argue that this can be achieved by studying the tools that practitioners relied on to describe and organize political authority in the world. I subsequently delve into a common, though seldom-studied, tool developed by a group of practitioners known as masters of ceremonies: courtly ceremonial (or ius praecedentiae). I make three substantive claims. First, the political authorities identified in manuals on courtly ceremonial were primarily crowns and republics, but in the later eighteenth century, all eventually came to be described as “states.” Second, all political authorities stood in a hierarchy determined by a specific set of criteria I identify, but new criteria—power and sovereignty—emerged over the course of the eighteenth century. Third, the scope of international order was not self-evident, and it certainly did not have clear “European” limits in the eyes of masters of ceremonies; non-European political authorities could easily be integrated into their orders of precedence. Ultimately, I suggest that IR scholars should reconsider why they study early modern Europe and how they study international orders.

A distinguishing feature of the modern state is the broad scope of social welfare provision. This remarkable expansion of public assistance was characterized by huge spatial and temporal disparities. What explains the uneven expansion in the reach of social welfare? We argue that social welfare expansion depends in part on the ability of the governed to compel the state to provide rewards in return for military service—and crucially, that marginalized groups faced greater barriers to obtaining those rewards. In colonial states, subjects faced a bargaining disadvantage relative to citizens living in the colony and were less likely to win concessions from the state for their wartime sacrifices. We test this argument using a difference-in-differences research design and a rich data set of local spending before and after World War I in colonial Algeria. Our results reveal that social welfare spending expanded less in communes where the French subject share of the population was greater. This paper contributes to the state-building literature by highlighting the differential ability of the governed to bargain with the state in the aftermath of conflict.

In this article I explain a nexus between slavery and state formation in Africa, proceeding from initial demographic and institutional conditions to an external demand shift, individual state responses, and their collective systemic consequences. Historically, African rulers faced distinctive challenges: low population density prioritized control of people more than territory, and internal disintegration was often a greater threat than external conquest. A massive expansion in the demand for slaves offered African rulers increased opportunities to use external resources for “outside-in” state building. Many did so by creating highly militarized predatory slaving states. The collective consequence was heightened systemic insecurity. Variation in the timing of these developments reflected regional and historical variation in the expansion of the demand for slaves. Slaving states appeared first in West Africa, reflecting the late-seventeenth-century expansion of the trans-Atlantic slave trade, before spreading to East Africa a century later, following the parallel later increase in the Indian Ocean slave trade. This “outside-in” path to state formation both parallels and contrasts with contemporary postcolonial state formation.

Most autocracies restrict emigration yet still allow some citizens to exit. How do these regimes decide who can leave? We argue that many autocracies strategically target anti-regime actors for emigration, thereby crafting a more loyal population without the drawbacks of persistent co-optation or repression. However, this generates problematic incentives for citizens to join opposition activity to secure exit. In response, autocracies simultaneously punish dissidents for attempting to emigrate, screening out all but the most determined opponents. To test our theory, we examine an original data set coded from over 20,000 pages of declassified emigration applications from East Germany's state archives. In the first individual-level test of an autocracy's emigration decisions, we find that active opposition promoted emigration approval but also punishment for applying. Pensioners were also more likely to secure exit, and professionals were less likely. Our results shed light on global migration's political sources and an overlooked strategy of autocratic resilience.

Colonial warfare has been a frequent and bloody feature of international relations, yet most studies of wartime civilian victimization focus on either interstate or civil wars. In this article I argue that ignoring colonial violence has distorted our understanding of state-directed violence against civilians in wartime. I introduce a new theory of colonial violence, which focuses on the distinctive strategic, normative, and institutional incentives that colonial powers have to harm civilians. To assess this theory, I introduce and analyze a new data set of 193 cases of colonial war from 1816 to 2003. Using a variety of measures of civilian harm, I find that colonial wars are especially brutal. Three-quarters of states in colonial wars targeted civilians, for example, compared to less than a third of states in interstate wars. But some colonial wars are harder on civilians than others. Colonial powers are more likely to harm civilians when their indigenous adversaries employ guerrilla tactics, when their indigenous adversaries come from a different perceived racial background, and when the colonial state relies on settlers or indigenous intermediaries to help compensate for its relative weakness. By ignoring colonial violence in world politics, we misunderstand the scale and scope of state-directed violence against civilians and miss an opportunity to deepen our understanding of the causes of this brutality.

Prominent theories of state formation hold that states formed because of warfare and competition on the one hand, or the diffusion of organizational templates and practices through learning and emulation on the other. We propose that the two strands of theory can be linked to more accurately account for mechanisms of state formation. War, we argue, is an important source of social diffusion. War establishes contacts between political elites across borders, generates migratory flows, and establishes new economic networks. We examine the validity of the theory through a comparative case study of Nordic political units from the dawn of the Viking Age to the end of the High Middle Ages (CE 800–1300), finding that raids, settlements, and conquests by Norwegian and Danish rulers in England, Europe's most advanced kingdom, set in motion state formation processes in Norway and Denmark. In these cases, the winners emulated the losers.

International organizations come in many shapes and sizes. Within this institutional gamut, the multipurpose multilateral intergovernmental organization (MMIGO) plays a central role. This institutional form is often traced to the creation of the League of Nations, but in fact the first MMIGO emerged in the Western Hemisphere at the close of the nineteenth century. Originally modeled on a single-issue European public international union, the Commercial Bureau of the American Republics evolved into the multipurpose, multilateral Pan American Union (PAU). Contrary to prominent explanations of institutional genesis, the PAU's design did not result from functional needs nor from the blueprints of a hegemonic power. Advancing a recent synthesis between historical and rational institutionalism, we argue that the first MMIGO arose through a process of compensatory layering: a mechanism whereby a sequence of bargains over control and scope leads to gradual but transformative institutional change. We expect compensatory layering to occur when an organization is focal, power asymmetries among members of that organization are large, and preferences over institutional design diverge. Our empirical and theoretical contributions demonstrate the value a more global international relations (IR) perspective can bring to the study of institutional design. international relations (IR) scholars have long noted that international organizations provide smaller states with voice opportunities; our account suggests those spaces may be of smaller states’ own making.

Charles Tilly's classical claim that “war made states” in early modern Europe remains controversial. The “bellicist” paradigm has attracted theoretical criticism both within and beyond its original domain of applicability. While several recent studies have analyzed the internal aspects of Tilly's theory, there have been very few systematic attempts to assess its logic with regard to the territorial expansion of states. In this paper, we test this key aspect of bellicist theory directly by aligning historical data on European state borders with conflict data, focusing on the period from 1490 through 1790. Proceeding at the systemic, state, and dyadic levels, our analysis confirms that warfare did in fact play a crucial role in the territorial expansion of European states before (and beyond) the French Revolution.

What effect does state violence have on the cohesiveness and fragmentation of insurgent organizations? This article develops a theory of how state violence against civilians affects insurgent cohesion and fragmentation in civil war. It argues that the state-led collective targeting of an armed group's alleged civilian constituency increases the probability of insurgent fragmentation, defined as the process through which insurgent organizations split into distinct entities, each with its own social composition, goals, and leadership. This effect is driven by the interaction of several mechanisms at the individual, group, and organizational levels: state-led collective targeting enlarges the supply of fresh recruits, strengthens the bonds between immediate group members (interpersonal cohesion), and disrupts intra-organizational coordination, strategic unity, and institutional arrangements that underpin the commitment of individual fighters to the organization as a whole (ideological cohesion). The implications of this argument are empirically tested in an analysis of armed groups fighting against their governments between 1946 and 2008. The results suggest that campaigns of massive state violence directed against the civilian constituency of rebel groups increase the overall risk of insurgent fragmentation, a finding that has important implications for the duration and escalation of civil wars.

Why do states create weak international institutions? Frustrated with proliferating but disappointing international environmental institutions, scholars increasingly bemoan agreements which, rather than solving problems, appear to exist “for show.” This article offers an explanation of this phenomenon. I theorize a dynamic of deflective cooperation to explain the creation of compromise face-saving institutions. I argue that when international social pressure to create an institution clashes with enduring disagreements among states about the merits of creating it, states may adopt cooperative arrangements that are ill-designed to produce their purported practical effects. Rather than negotiation failures or empty gestures, I contend that face-saving institutions represent interstate efforts to manage intractable disagreement through suboptimal institutionalized cooperation. I formulate this argument inductively through a new multi-archival study of conventional weapons regulation during the Cold War, which resulted in the oft-maligned 1980 UN Convention on Certain Conventional Weapons. A careful reconsideration of the negotiation process extends and nuances existing IR theorizing and retrieves its historical significance as a critical juncture and complex product of contesting diplomatic practices.

What happens to a public, domestic institution when its authority is delegated to a privately run, transnational institution? I argue that outsourcing traditionally national legal responsibilities to transnational bodies can lead to the stagnation of domestic institutional capacity. I examine this through a study of international commercial arbitration (ICA), a widely used system of cross-border commercial dispute resolution. I argue that ICA provides commercial actors an “exit option” from weak public institutions, reducing pressure on the state to invest in capacity-enhancing reform. I find that the enactment of strong protections for ICA leads to the gradual erosion of the capacity of domestic legal institutions, particularly in countries with already weak legal systems. I test the mechanism driving this dynamic using dispute data from the International Chamber of Commerce. I find that pro-arbitration laws increase the use of international arbitration by national firms, suggesting that firms use ICA as an escape from domestic institutions. This article contributes to debates on globalization and development as well as work on the second-order effects of global governance institutions.

Intense debate surrounds the effects of trade on voting, yet less attention has been paid to how fluctuations in the real exchange rate may influence elections. A moderately overvalued currency enhances consumers’ purchasing power, yet extreme overvaluation threatens exports and economic growth. We therefore expect exchange rates to have a conditional effect on elections: when a currency is undervalued, voters will punish incumbents for further depreciations; yet when it is highly overvalued, they may reward incumbents for depreciation. We empirically explore our argument in three steps. First, we examine up to 412 elections in up to 59 democratic countries and show that voters generally punish depreciation in the real exchange rate when the currency is undervalued. We also find that at extremely high levels of currency overvaluation, voters sometimes reward incumbents for depreciation. A currency peg, especially in the eurozone, appears to insulate incumbents from these effects. In a second step, we explore the microfoundations of the election results through survey experiments in three advanced industrialized and two emerging market nations with different monetary and exchange rate policies and institutions. Respondents in countries with undervalued to mildly overvalued currencies disapprove of currency depreciations, whereas those facing a very highly overvalued currency favor depreciation. Third, we examine the mechanism of political competition in exchange rate policymaking and demonstrate that sustained undervaluation is rare in countries with strong political competition. Democratic governments have electoral incentives to avoid using undervalued currencies as a means of shielding workers from import competition.

Almost all technology is dual use to some degree: it has both civilian and military applications. This feature creates a dilemma for cooperation. States can design arms control institutions to curtail costly competition over some military technology. But they also do not want to limit valuable civilian uses. How does the dual use nature of technology shape the prospects for cooperation? We argue that the duality of technology presents a challenge not by its very existence but rather through the ways it alters information constraints on the design of arms control institutions. We characterize variation in technology along two dual use dimensions: (1) the ease of distinguishing military from civilian uses; and (2) the degree of integration within military enterprises and the civilian economy. Distinguishability drives the level of monitoring needed to detect violations. When a weapon is indistinguishable from its civilian counterpart, states must improve detection though intelligence collection or intrusive inspections. Integration sharpens the costs of disclosing information to another state. For highly integrated technology, demonstrating compliance could expose information about other capabilities, increasing the security risks from espionage. Together, these dimensions generate expectations about the specific information problems states face as they try to devise agreements over various technologies. We introduce a new qualitative data set to assess both variables and their impact on cooperation across all modern armament technologies. The findings lend strong support for the theory. Efforts to control emerging technologies should consider how variation in the dual use attributes shapes this tension between detection and disclosure.

This article describes and explains a previously overlooked empirical pattern in state revenue collection. As late as 1913, central governments in the West collected similar levels of per capita revenue as the rest of the world, despite ruling richer societies and experiencing a long history of fiscal innovation. Western revenue levels permanently diverged only in the following half-century. We identify the twentieth-century great revenue divergence by constructing a new panel data set of central government revenue with broad spatial and temporal coverage. To explain the pattern, we argue that sustainably high levels of revenue extraction require societal demand for an activist state, and a supply of effective bureaucratic institutions. Neither factor in isolation is sufficient. We formalize this insight in a game-theoretic model. The government can choose among low-effort, legibility-intensive, and crony-favoring strategies for raising revenues. Empirically, our theory accounts for low revenue intake in periods of low demand (the nineteenth-century West) or low bureaucratic capacity (twentieth-century former colonies), and for eventual revenue spikes in the West.

What is the level of state capacity in developing countries today, and what have been its drivers over the past century? We construct a comprehensive new data set of tax and revenue collection for forty-six African polities from 1900 to 2015. Our data show that polities in Africa have been characterized by strong growth in fiscal capacity on average, but that substantial heterogeneity exists. The empirical analysis reveals that canonical state-building factors such as democratic institutions and interstate warfare have limited power to explain these divergent growth paths. On the other hand, accounting for the relationship between African polities and the international environment—through the availability of external finance and the legacy of colonialism—is key to understanding their differing investments in fiscal capacity. These insights add important nuances to established theories of state building. Not only can the availability of external finance deter investment in fiscal capacity, but it also moderates the efficacy of canonical state-building factors.

The development of parliamentary constraints on the executive was critical in Western European political history. Previous scholarship identifies external wars as a key factor, but with varying effects. Sometimes, willing monarchs granted parliamentary rights in return for revenues to fight wars. Yet at other times, war threats empowered rulers over other elites or caused states to fragment. We analyze a formal model to understand how external wars can either stimulate or undermine prospects for a contractual relationship between a ruler and elite actors. We recover the standard intuition that war threats make the ruler more willing to grant parliamentary rights in return for revenue. Our key insight is that war threats also affect the bargaining position of elites. A previously unrecognized tension yields our new findings: stronger outsider threats increase pressure either on elites to fund the ruler or on the ruler to accept constraints—but not both simultaneously. Elites with immobile wealth depend on the ruler for security. War threats undercut their credibility to refuse funding for an unconstrained ruler. By contrast, war threats make elites with mobile wealth and a viable exit option unwilling to fund a hopeless war effort. Only under circumscribed conditions do war threats align three conditions needed for parliament to arise in equilibrium: ruler willingness, elite credibility, and elite willingness. We apply our theory to posit strategic foundations for waves and reversals of historical European parliaments.

How do states distribute the burdens of collective defense? This paper develops a network theory of burden sharing. We focus on bilateral defense cooperation agreements (DCAs), which promote cooperation in a variety of defense, military, and security issue areas. Using a computational model, we show that DCA partners’ defense spending depends on the network structure of their agreements. In bilateral terms, DCAs increase defense spending by committing states to defense activities and allowing partners to reciprocally punish free riding. However, as a state's local network of defense partnerships grows more densely connected, with many transitive “friend of a friend” relations, DCAs have the countervailing effect of reducing defense spending. The more deeply integrated states are in bilateral defense networks, the less they spend on defense. We distinguish two potential mechanisms behind this effect—one based on efficiency improvements, the other on free riding. An empirical analysis using multilevel inferential network models points more to efficiency than to free riding. Defense networks reduce defense spending, and they do so by allowing countries to produce security more efficiently.

Despite the widespread assumption of terrorism's “terrifying” effect, there has been little systematic testing of the specific emotional microfoundations underlying public opinion about terrorism. While fear is one well-recognized emotional response to terror threats, in societies where terrorism is rare, anger may play a more pivotal role, with distinct consequences for citizens’ downstream political attitudes. To test the impact of these emotional mechanisms on public opinion in the wake of terrorism, I employ a multi-arm mechanism experiment (n = 5,499) in the United States that manipulates both exposure to news about different types of terror attacks and the encouraged emotional response. I supplement this experimental study with observational analyses of the emotional content of social media posts in the wake of sixteen real-world terror attacks in the United States. I find that not only is anger the dominant emotional response to terrorism across both studies, but also that punitive motivations and support for retaliation are both directly shaped by experimentally induced anger after exposure to news about terrorism. These findings illuminate strategic incentives shaping militants’ use of terror tactics, electoral constraints leaders face in formulating counterterror policy, and the emotional mechanisms fueling cycles of political violence.

How do emerging technologies affect nuclear stability? In this paper, we use a quasi-experimental cyber-nuclear wargame with 580 players to explore three hypotheses about emerging technologies and nuclear stability: (1) technological uncertainty leads to preemption and escalation; (2) technological uncertainty leads to restraint; and (3) technological certainty leads to escalation through aggressive counterforce campaigns. The wargames suggest that uncertainty and fear about cyber vulnerabilities create no immediate incentives for preemptive nuclear use. The greater danger to strategic stability lies in how overconfidence in cyber exploits incentivizes more aggressive counterforce campaigns and, secondarily, how vulnerabilities encourage predelegation or automation. Both of these effects suggest worrisome relationships between cyber exploits and inadvertent nuclear use on one hand and cyber vulnerabilities and accidental nuclear use on the other hand. Together, these findings reveal the complicated relationship between pathways to escalation and strategic stability, highlighting the role that confidence and perhaps-misplaced certainty—versus uncertainty and fear—play in strategic stability.