Hegemons exercise power in the international system not only by manipulating material incentives but also by altering the substantive beliefs of elites in other nations. Socialization—the process through which leaders in these secondary states embrace a set of normative ideals articulated by the hegemon—plays an important role both in establishing an international order and in facilitating the functioning of that order. This article develops the notion of socialization in the international system and examines three hypotheses about the conditions under which it occurs and can function effectively as a source of power. The first hypothesis is that socialization occurs primarily after wars and political crises, periods marked by international turmoil and restructuring as well as by the fragmentation of ruling coalitions and legitimacy crises at the domestic level. The second is that elite (as opposed to mass) receptivity to the norms articulated by the hegemon is essential to the socialization process. The third hypothesis is that when socialization does occur, it comes about primarily in the wake of the coercive exercise of power. Material inducement triggers the socialization process, but socialization nevertheless leads to outcomes that are not explicable simply in terms of the manipulation of material incentives. These hypotheses are explored in the historical case studies of U.S. diplomacy after World Wars I and II and the British colonial experience in India and Egypt.

A model for forecasting political choices and for explaining the perceptual conditions that lead to those choices is delineated. The model, based on the median voter theorem and on the axioms of expected utility maximization, is applied to the prospects for a multilateral peace conference in the Middle East. The analysis helps provide insights into the motivations behind recent actions by leaders in the Soviet Union, the United States, Jordan, the Palestine Liberation Organization, and Israel.

By viewing multilateral negotiations in a rational choice context, it is possible to elucidate the contents of calculations that reflect decision makers' considerations if they are trying to do what they believe is in their best interest. By modeling the decision process and then using comparative statics simulations, it is also possible to discern when perceptions and reality are likely to deviate from each other and to gauge the hypothesized responses of all the actors to changed circumstances. In this way, the likely impact of Soviet moderation, Israeli intransigence, Jordanian vacillation, or U.S. intervention can be identified.

Instances of external state involvement in seven postwar secessionist movements—those of Katanga, Biafra, the Southern Sudan, Bangladesh, Iraqi Kurdistan, Eritrea, and the Moro region of the Philippines—were analyzed to shed light on the patterns of interaction between the international system and secessionist minorities. Examined and tested were numerous assumptions of conventional wisdom on the subject, as well as a variety of other relevant questions concerning the constraints on, content of, and reasons for involvement. The results were contrary to many of the common assumptions. For example, given the international regime's norm against involvement with groups that threaten territorial integrity, external state support of these groups was more extensive than would be expected; and support was given for diverse reasons, rather than based solely on the prospects for tangible gain. Additional results of this study suggest a series of hypotheses for further examination.

Mancur Olson's theory of collective action could account for much of the variance in the defense burdens of the allied nations of the North Atlantic Treaty Organization (NATO) in the early years of the Cold War, but the association between economic size (gross domestic product, or GDP) and defense burden (the ratio of military expenditures to GDP) has declined to insignificant levels. Two influences are shown to be important in producing this change: the increased pursuit of private goods by Greece, Turkey, and Portugal and the growing cooperation among the other European allies. Since cooperation in the military realm has not provided the Europeans with credible means of self-defense, it appears to be a consequence of the general growth of interdependence in Europe during the postwar period. NATO is still essentially a uniquely privileged group producing a relatively pure public good. Accordingly, the theory of collective action continues to provide valuable insights into the operation of the alliance.