In post–cold war Europe, international institutions associated with an earlier era of U.S. hegemony in the Western hemisphere continue to exist and in some cases are playing a significant role in managing a broad array of challenges. New institutions are also being created to manage new challenges. The European Bank for Reconstruction and Development (EBRD) may be the most visible example. On 29 May 1990, forty states and two European organizations signed articles of agreement to establish this new institution, whose declared purpose is “to foster the transition towards open market-oriented economies and to promote private and entrepreneurial initiative in the Central and Eastern European countries committed to and applying the principles of multiparty democracy, pluralism, and market economies.”

By the end of the medieval era, three new competing institutions attempted to capture gains from trade and reduce feudal particularism: sovereign territorial states, cityleagues, and city-states. By the middle of the seventeenth century, city-leagues and city-states had declined markedly. Territorial states survived as the dominant form because they were able to reduce free riding, lower transaction costs, and credibly commit their constituents. The selection process took place along three dimensions. First, sovereign territorial states proved competitively superior in the economic realm. Second, states increasingly recognized only other sovereign territorial states as legitimate actors in the international system. Third, other actors defected to or copied the institutional makeup of sovereign territorial organization. The emergence of discrete territorial units in which only sovereign authorities represented their citizens as the predominant type of organization in international affairs created a new solution to the problem of markets and hierarchies.

The direction and scope of the change in Soviet foreign policy after 1985 cannot be explained without reference to the impact of Gorbachev's representation of the Soviet security problem. Changes in the international distribution of capabilities and generational change are indeterminate explanations of the changes in Soviet foreign policy. Building on propositions from social cognition and organizational psychology, I argue that through inductive “trial-and-error learning” from failure, Gorbachev developed a new representation of the “ill-structured” Soviet security problem. Gorbachev learned in part because he was a relatively uncommitted thinker on security issues and was open to the ideas of experts. He was also highly motivated to learn because of his commitment to domestic reform. The complex interactive relationship between learning and action that provided quick feedback is captured by the social cognition of “learning by doing.” The conditionality of political learning suggests a rich research agenda for the analysis of foreign policy change.

In precolonial and colonial North America five Iroquois nations, which previously had fought for generations, stopped wars among themselves and lived in peace for about 325 years. This history raises several questions: why did the Iroquois nations stop fighting each other; did the fact that each nation was a democracy have anything to do with the end of war among them; and what are the lessons of this peace for international relations scholars? A security regime formed by the Iroquois in 1450, known as the Iroquois League, accounts for the peace. Comparing the Iroquois League with the Concert of Europe indicates an important role for norms and institutionalization in ameliorating the security dilemma. Further, the five democratic nations that formed the Iroquois League exemplify Immanuel Kant's idea of a system for “perpetual peace.” Finally, the history of the Iroquois League challenges realist claims of cross-cultural and timeless validity.

Why do states contribute to alliances? Is relative size the principal factor influencing the size of contributions, as many studies suggest, or are perceptions of threat, dependencies on other alliance members, and domestic institutions and policies equally important? These questions hold unusual interest in the wake of the cold war. The end of bipolarity promises more ad hoc coalitions, which will widen opportunities for research on alliance burden-sharing beyond the North Atlantic Treaty Organization (NATO). At the same time, because the political fault lines of the cold war have disappeared, there are few accepted political criteria for sharing those security burdens that are perceived collectively.

Realist or liberal explanations for the end of the cold war cannot account for the specific content of the change in Soviet foreign policy or for Western responses to it. These theories need to be complemented by approaches that emphasize the interaction between international and domestic factors and that take seriously the proposition that ideas intervene between structural conditions and actors' interests. Some of the strategic prescriptions that informed the reconceptualization of Soviet security interests originated in the Western liberal internationalist community, which formed transnational networks with “new thinkers” in the former Soviet Union. These new ideas became causally consequential for the turnaround in Soviet foreign policy and also had an impact on American and German reactions to it. Even though transnational networks were active in Germany, the Soviet Union, and the United States, their success varied. Domestic structures like the nature of political institutions, state-society relations, and political culture determine the ability of transnational networks first, to gain access to a country's political system and second, to build “winning coalitions.” These differences in domestic structures can largely explain the variation in impact of the strategic prescriptions among the three countries.

The impact of economic factors on colonial imperialism in the late nineteenth century has long been a topic of debate. This article examines the expected relationship between different forms of international investment and different patterns of political ties between developed and developing countries. Drawing on the literature on relational contracts and collective action, it argues that direct colonial control was likely to be associated with cross-border investments whose rents were particularly easy to seize or protect, and whose protection did not require multilateral action. Where such rents were difficult to seize or protect unilaterally, colonialism is expected to be less likely. The most common example of the former sort of investment is primary (raw-materials or agricultural) investment; of the latter, multinational manufacturing affiliates. The argument is weighed against both a survey of the qualitative evidence and some simple quantitative evaluations. The approach also has potential applications to more general problems of international conflict and cooperation.

The problems of distribution and information impede international cooperation. They arise when actors select how they will cooperate. An exploration of the interaction between these problems using a limited information model of cooperation leads to six conclusions. First, leadership solutions to coordination problems always exist, but leadership here is very different from hegemonic provision of public goods. Second, actors can cooperate in the face of anarchy even without a shadow of the future. Third, diffuse reciprocal strategies arise naturally in coordination problems. Fourth, norms and institutions are intertwined within successful cooperation. Fifth, the form of cooperation on an issue varies with the relative importance of distribution and information. Finally and most important, distributional and informational problems interfere with each other. Arrangements to cooperate can successfully address one, but not both, of these problems.

Whether a treaty elicits compliance from governments or nonstate actors depends upon identifiable characteristics of the regime's compliance systems. Within the international regime controlling intentional oil pollution, a provision requiring tanker owners to install specified equipment produced dramatically higher levels of compliance than a provision requiring tanker operators to limit their discharges. Since both provisions entailed strong economic incentives for violation and regulated the same countries over the same time period, the variance in compliance clearly can be attributed to different features of the two subregimes. The equipment requirements' success stemmed from establishing an integrated compliance system that increased transparency, provided for potent and credible sanctions, reduced implementation costs to governments by building on existing infrastructures, and prevented violations rather than merely deterring them.

Despite growing international environmental interdependence, the international system lacks a central authority to foster environmental protection. As a consequence, countries have adopted different policies to reduce international environmental problems. More specifically, costly regulations are not universally supported. In order to explain the success and failure of international environmental regulation, it is necessary to systematically focus on the factors that shape the environmental foreign policy of sovereign states. Since such an approach is missing from the literature, we develop an interest-based explanation of support for international environmental regulation and postulate what impact it should have on state preferences for international environmental regulation. Specifically we apply our framework to two prominent cases of negotiations on atmospheric pollution control, namely, efforts to protect the stratospheric ozone layer and the regulation of transboundary acidification (“acid rain”) in Europe.

If different parties control the U.S. Congress and White House, the United States may maintain higher import protection than otherwise. This proposition follows from a distributive politics model in which Congress can choose to delegate trade policymaking to the President. When the congressional majority party faces a President of the other party, the former has an incentive to delegate to but to constrain the President by requiring congressional approval of trade proposals by up-or-down vote. This constraint forces the President to provide higher protection in order to assemble a congressional majority. Evidence confirms that (1) the institutional constraints placed on the President's trade policymaking authority are strengthened in times of divided government and loosened under unified government and (2) U.S. trade policy was significantly more protectionist under divided than under unified government during the period 1949–90.

The succession of mostly nonviolent revolutions that replaced Eastern European communist governments in 1989 and the lack of any action by the Soviet Union to stop these changes transformed the international political system. Since these changes were not driven by changes in relative capabilities, they did not follow the postulates of neorealist theory. Rather, the revolutions of 1989 changed the rules governing superpower conflict and, thereby, the norms underpinning the international system. This constructivist perspective systematically links domestic and international structures with political practice and shows that international systems consist of ensembles of social institutions. These institutions change in response not only to shifting distributions of capabilities but also to redefinition of actors' identities as well as changes in state-society relations. Transformations of the international system occur when political practices change and therefore fail to reproduce the familiar international “structures.”

The international relations literature regularly embraces sovereignty as the primary constitutive rule of international organization. Theoretical traditions that agree on little else all seem to concur that the defining feature of the modern international system is the division of the world into sovereign states. Despite differences over the role of the state in international affairs, most scholars would accept John Ruggie's definition of sovereignty as “the institutionalization of public authority within mutually exclusive jurisdictional domains.” Regardless of the theoretical approach however, the concept tends to be viewed as a static, fixed concept: a set of ideas that underlies international relations but is not changed along with them. Moreover, the essence of sovereignty is rarely defined; while legitimate authority and territoriality are the key concepts in understanding sovereignty, international relations scholars rarely examine how definitions of populations and territories change through-out history and how this change alters the notion of legitimate authority.

European integration follows a puzzling stop-and-go pattern that traditional international reations theories cannot fully explain. The predominating paradigms only account for either the achievements or the setbacks of the integration process. An information based explanation makes it possible to move beyond structural accounts provided by realist and functionalist scholarship. Such an approach yields solid micro-level foundations of international bargaining and focuses on leaders' use of threats in negotiations about regional cooperation. Situations involving governments agreeing on the necessity of further integration, but disagreeing about its level, create room for strategic manipulation of information asymmetries. This type of uncertainty stems from the manipulator's information and control advantages concerning domestic costs. The analysis of different summit meetings demonstrates the empirical relevance of such maneuvers for the dynamics of European integration.

Three of the more important international developments of the last half century are the “long peace” between the superpowers, the Soviet Union's renunciation of its empire and leading role as a superpower, and the post-cold war transformation of the international system. Realist theories at the international level address the first and third of these developments, and realist theories at the unit level have made an ex post facto attempt to account for the second. The conceptual and empirical weaknesses of these explanations raise serious problems for existing realist theories. Realists contend that the anarchy of the international system shapes interstate behavior. Postwar international relations indicates that international structure is not determining. Fear of anarchy and its consequences encouraged key international actors to modify their behavior with the avowed goal of changing that structure. The pluralist security community that has developed among the democratic industrial powers is in part the result of this process. This community and the end of the cold war provide evidence that states can escape from the security dilemma.

Standard explanations for trade liberalization do not fully account for Mexico's turn toward free trade during the 1980s. To a large extent, the initiative came from within the country. Even many Mexican entrepreneurs whose sectors seem likely to lose from increased competition now support trade liberalization. Four conditions lowered the “political cost-benefit ratio” for policymakers and entrepreneurs. First, Mexico's leaders dispersed implementation into several financial ministries, thereby better insulating this policy from lobbying by the likely “losers.” Second, potential losers were less well-informed than were likely “winners.” Third, under these conditions, the liberal ideological biases of Mexican elite policymakers and investors flourished, prompting them to accept a higher political cost than would have been tolerated otherwise. Finally, many Mexicans came to perceive trade liberalization as a necessary tool in the fight against inflation. Each of these hypotheses, however, also flags a possible threat to the policy's future political survival.

Too much emphasis has been placed on formal state policies and on ties between individual firms to explain Japanese economic behavior and impediments to imports in Japanese markets. We need to look instead at informal governance by trade associations. In so doing, the concept of relational contracting should be applied not just to dyadic relationships between individual firms but also to relationships between entire industries. Whole industries engage in relational contracting to ensure the stability of both prices and supplies. These industry agreements stabilize Japanese markets but at the same time keep imports out of them. This informal governance complements state policies to support uncompetitive industries. These agreements are more likely to occur and succeed between selling and buying industries that each are relatively concentrated, when upstream products are standardized, when upstream goods constitute a smaller share of downstream production costs, when these sectors have not experienced previous conflicts that undermine cooperation, and when the Ministry of International Trade and Industry wants a domestic supply of its products.

Do political leaders learn from historical experience, and do the lessons of history influence their foreign policy preferences and decisions? It appears that decision makers are always seeking to avoid the failures of the past and that generals are always fighting the last war. The “lessons of Munich” were invoked by Harry Truman in Korea, Anthony Eden in Suez, John Kennedy in the Cuban Missile Crisis, Lyndon Johnson in Vietnam, and George Bush in the Persian Gulf War. The “lessons of Korea” influenced American debates about Indochina, and the “lessons of Vietnam” were advanced in debates about crises in the Persian Gulf and in Bosnia. Statesmen at Versailles sought to avoid the mistakes of Vienna and those at Bretton Woods, the errors of the Great Depression. Masada still moves the Israelis, and Kosovo drives the Serbs. Inferences from experience and the myths that accompany them often have a far greater impact on policy than is warranted by standard rules of evidence. As J. Steinberg argues, in words that apply equally well to the Munich analogy and the Vietnam syndrome, memories of the British capture of the neutral Danish fleet at Copenhagen in 1807 (the “Copenhagen complex”) “seeped into men's perceptions and became part of the vocabulary of political life,” and it influenced German decision making for a century.

What conditions led the One Hundredth Congress of the United States to enact fair trade and strategic trade policies into law during 1987-88? Political partisanship is an important force, with Democrats supporting and Republicans opposing all types of trade intervention. Otherwise, the coalitions of support for and opposition to the various trade policies differ, particularly in the Senate. In that body, international business is associated with support for fair trade policies and with opposition to classical protectionism, while domestic U.S. business is associated with support for classical protectionism. Liberalism is strongly associated with support for fair and strategic trade policies but is not associated with classical protectionism. In the House of Representatives, the long-standing protectionist coalition remains an influence. Few forces in support of free trade remain in U.S. politics. Changing international market conditions rapidly affect the making of U.S. trade policy.

International relations scholars are prone to claiming that the ancient historian of the Peloponnesian War, Thucydides, is a realist of one kind or another. Paul Viotti and Mark Kauppi tell us that Thucydides “is usually credited with being the first writer in the realist tradition as well as the founding father of the international relations discipline.” Michael Doyle writes, “To most scholars in international politics, to think like a Realist is to think as the philosophical historian Thucydides first thought.” Kenneth Waltz found in Thucydides an expression of his “third image,” in which the balance of power states find themselves in largely determines their actions. Robert Keohane and Joseph Nye use Thucydides as a representative of their “overall power model” or the “traditional” international relations paradigm. Both classical realists, who begin with an understanding of human nature, and neorealists, who emphasize the international structure, can find support for their theoretical viewpoint in Thucydides.