Diplomacy’s role in foreign policy is hampered by multiple understandings of what diplomacy is and does. A broad definition of diplomacy holds that it encompasses more than the promotion of peaceful international relations. Instead, it applies to the sum of those relations—peaceful, hostile, and everything in between. Thus, foreign relations—so long as they involve the interests, direction, and actions of a sovereign power—may be regarded as being synonymous with diplomatic relations, whereby foreign policy relates to the theory and practice of setting diplomatic priorities; planning for contingencies; advancing strategic, operational, and tactical diplomatic aims; and adjusting those aims to domestic and foreign constraints. This conception of diplomacy is functional: it emphasizes the roles of diplomats and recognizes that many other people perform these roles besides official envoys; and it illustrates that diplomatic settings—and the means, methods, and tools of diplomacy—undergo continuous change. The basic mediating purpose of diplomacy, however, has endured, as has much of its institutional apparatus—embassies, ambassadors, treaties, and so on. This is likely to remain the case so long as there are multiple polities in the world, all having to relate to one another.
An improved understanding of foreign policy learning necessitates a clarification of what foreign policy learning is, who learns, and how such learning occurs. Cognitive and social psychologists, sociologists, and political scientists situated in a variety of subfields have contributed to the understanding of foreign policy learning, a multidisciplinary area of inquiry. Learning theorists seek to show how a change in an actor’s beliefs due to experience or observation can lead to changes at other units, such as organizations and within the government. This cognitive dimension is important because actors may pursue a new course of action for politically expedient reasons rather than having genuinely “learned”—a distinction referred to as “complex” vs. “simple” learning.
Foreign policy learning can be internal or external. The former type of learning entails what individuals, governments, or organizations learn from their prior experience. Learning theorists who focus on the individual level of analysis borrow insights from political psychology in an effort to shed light on the personal characteristics, the belief structures, and the cognitive psychological mechanisms of political actors that can better inform policymaking. Leaders whose cognitive structures are described as relatively open and complex—like Soviet leader Mikhail Gorbachev, whose learning brought about the dramatic changes that ultimately led to the demise of the Soviet Union—are more likely to alter their beliefs than their cognitively closed and simple counterparts.
Yet external learning occurs as well. Policy diffusion studies show that learning can result from demonstration effects. Foreign policy learning via diffusion is not instrumental, but instead occurs through osmosis. Privatization in the former communist states, China’s Foreign Direct Investment liberalization, and the diffusion of environmental norms in the European Union are examples of learning that is contagious, not chosen. A more conscious mode of learning than diffusion is policy transfer, which entails policymakers’ transferring ideas from one country and implementing them in another. Technological innovations, unlike lessons that involve political ideology, are generally easier lessons to transfer—for example, Japan’s success in applying lessons from the West to modernize its army in the second half of the 19th century.
The constraints to foreign policy learning are formidable. Decision makers are not always open to reconsidering views that challenge their beliefs. Leaders tend to resort to, and misuse, analogies that prevent learning. Even a change in a decision maker’s beliefs may not lead to foreign policy change, given the myriad political pressures, bureaucratic hurdles, and economic realities that often get in the way of implementing new ideas. Indeed, foreign policy learning and foreign policy change are not synonymous.
Scholars face significant obstacles in studying foreign policy learning. There is no consensus on the definition of learning, on what constitutes learning, on how actors learn, when they learn, or on how to assess whether learning has taken place. Despite attempts to make sense of the confusion, scholars face the daunting challenge of improving understanding of how learning is shaped and funneled through the interaction of agents and the structures in which they are situated, as well as the relationship between learning and foreign policy change.