Why have states throughout history regularly underestimated dangers to their survival? Why have some states been able to mobilize their material resources effectively to balance against threats, while others have not been able to do so? The phenomenon of "underbalancing" is a common but woefully underexamined behavior in international politics. Underbalancing occurs when states fail to recognize dangerous threats, choose not to react to them, or respond in paltry and imprudent ways. It is a response that directly contradicts the core prediction of structural realism's balance-of-power theory--that states motivated to survive as autonomous entities are coherent actors that, when confronted by dangerous threats, act to restore the disrupted balance by creating alliances or increasing their military capabilities, or, in some cases, a combination of both. Consistent with the new wave of neoclassical realist research, Unanswered Threats offers a theory of underbalancing based on four domestic-level variables--elite consensus, elite cohesion, social cohesion, and regime/government vulnerability--that channel, mediate, and redirect policy responses to external pressures and incentives. The theory yields five causal schemes for underbalancing behavior, which are tested against the cases of interwar Britain and France, France from 1877 to 1913, and the War of the Triple Alliance (1864-1870) that pitted tiny Paraguay against Brazil, Argentina, and Uruguay. Randall Schweller concludes that those most likely to underbalance are incoherent, fragmented states whose elites are constrained by political considerations.

Why have states throughout history regularly underestimated dangers to their survival? Why have some states been able to mobilize their material resources effectively to balance against threats, while others have not been able to do so? The phenomenon of "underbalancing" is a common but woefully underexamined behavior in international politics. Underbalancing occurs when states fail to recognize dangerous threats, choose not to react to them, or respond in paltry and imprudent ways. It is a response that directly contradicts the core prediction of structural realism's balance-of-power theory--that states motivated to survive as autonomous entities are coherent actors that, when confronted by dangerous threats, act to restore the disrupted balance by creating alliances or increasing their military capabilities, or, in some cases, a combination of both. Consistent with the new wave of neoclassical realist research, Unanswered Threats offers a theory of underbalancing based on four domestic-level variables--elite consensus, elite cohesion, social cohesion, and regime/government vulnerability--that channel, mediate, and redirect policy responses to external pressures and incentives. The theory yields five causal schemes for underbalancing behavior, which are tested against the cases of interwar Britain and France, France from 1877 to 1913, and the War of the Triple Alliance (1864-1870) that pitted tiny Paraguay against Brazil, Argentina, and Uruguay. Randall Schweller concludes that those most likely to underbalance are incoherent, fragmented states whose elites are constrained by political considerations.

Why have states throughout history regularly underestimated dangers to their survival? Why have some states been able to mobilize their material resources effectively to balance against threats, while others have not been able to do so? The phenomenon of "underbalancing" is a common but woefully underexamined behavior in international politics. Underbalancing occurs when states fail to recognize dangerous threats, choose not to react to them, or respond in paltry and imprudent ways. It is a response that directly contradicts the core prediction of structural realism's balance-of-power theory--that states motivated to survive as autonomous entities are coherent actors that, when confronted by dangerous threats, act to restore the disrupted balance by creating alliances or increasing their military capabilities, or, in some cases, a combination of both. Consistent with the new wave of neoclassical realist research, Unanswered Threats offers a theory of underbalancing based on four domestic-level variables--elite consensus, elite cohesion, social cohesion, and regime/government vulnerability--that channel, mediate, and redirect policy responses to external pressures and incentives. The theory yields five causal schemes for underbalancing behavior, which are tested against the cases of interwar Britain and France, France from 1877 to 1913, and the War of the Triple Alliance (1864-1870) that pitted tiny Paraguay against Brazil, Argentina, and Uruguay. Randall Schweller concludes that those most likely to underbalance are incoherent, fragmented states whose elites are constrained by political considerations.

The balance of power principle has been central to both the study and practice of international politics for over 300 years. It has guided governments in the conduct of foreign policy and provided a structure for explanations of some of the recurring patterns of international relations. This study examines the various meanings given to the balance of power over the centuries and traces the historical evolution of its theory and practice through steadily more complex forms. It describes the balance principle in practice, both as a guiding light of national foreign policies and as a structural explanation of how the international system operates. The reader is provided with an understanding of the various meanings of the balance principle and the key thinkers and politicians who have influenced its development. The text presents the essence of arguments concerning the morality of the principle as a foreign policy guide and its value as a structural explanation of the fundamental reality of international relations.

Scholars have long argued over whether the 1648 Peace of Westphalia, which ended more than a century of religious conflict arising from the Protestant Reformations, inaugurated the modern sovereign-state system. But they largely ignore a more fundamental question: why did the emergence of new forms of religious heterodoxy during the Reformations spark such violent upheaval and nearly topple the old political order? In this book, Daniel Nexon demonstrates that the answer lies in understanding how the mobilization of transnational religious movements intersects with--and can destabilize--imperial forms of rule. Taking a fresh look at the pivotal events of the sixteenth and seventeenth centuries--including the Schmalkaldic War, the Dutch Revolt, and the Thirty Years' War--Nexon argues that early modern "composite" political communities had more in common with empires than with modern states, and introduces a theory of imperial dynamics that explains how religious movements altered Europe's balance of power. He shows how the Reformations gave rise to crosscutting religious networks that undermined the ability of early modern European rulers to divide and contain local resistance to their authority. In doing so, the Reformations produced a series of crises in the European order and crippled the Habsburg bid for hegemony. Nexon's account of these processes provides a theoretical and analytic framework that not only challenges the way international relations scholars think about state formation and international change, but enables us to better understand global politics today.

What turns rich nations into great powers? How do wealthy countries begin extending their influence abroad? These questions are vital to understanding one of the most important sources of instability in international politics: the emergence of a new power. In From Wealth to Power, Fareed Zakaria seeks to answer these questions by examining the most puzzling case of a rising power in modern history--that of the United States. If rich nations routinely become great powers, Zakaria asks, then how do we explain the strange inactivity of the United States in the late nineteenth century? By 1885, the U.S. was the richest country in the world. And yet, by all military, political, and diplomatic measures, it was a minor power. To explain this discrepancy, Zakaria considers a wide variety of cases between 1865 and 1908 when the U.S. considered expanding its influence in such diverse places as Canada, the Dominican Republic, and Iceland. Consistent with the realist theory of international relations, he argues that the President and his administration tried to increase the country's political influence abroad when they saw an increase in the nation's relative economic power. But they frequently had to curtail their plans for expansion, he shows, because they lacked a strong central government that could harness that economic power for the purposes of foreign policy. America was an unusual power--a strong nation with a weak state. It was not until late in the century, when power shifted from states to the federal government and from the legislative to the executive branch, that leaders in Washington could mobilize the nation's resources for international influence. Zakaria's exploration of this tension between national power and state structure will change how we view the emergence of new powers and deepen our understanding of America's exceptional history.

Scholars frequently portray the Second World War as an epic morality play driven by a villain (Hitler) and a sinner (Chamberlain). Deadly Imbalances offers a new approach, combining both the attributes of states and the structure of the international system to explain the origins and causes of the war. Central to Schweller's analysis is the argument that the structure of the international system was tripolar--with Germany, the Soviet Union, and the United States as the three central powers--and that this needs to be considered in any examination of the antecedent causes and crucial events of the war.