International relations theory and multilateralism: the search for foundations

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Abstract
Why has the concept of multilateralism not played a more prominent role in theories of international relations? The prima facie case for the importance of multilateral activity in the international realm would seem great. The world, we constantly tell ourselves, is increasingly drawn together. The Swedish economist Assar Lindbeck argues that most external effects of production and consumption are external not only to the household but also to the country in which they occur. According to many different indicators, interdependence is on the increase in nearly all parts of the world. International political economists talk about global indivisibilities, ranging from peace to pollution. Most important international problems-including pollution, energy, managing airline traffic, and maintaining rules for trade and investment-intrinsically involve many countries simultaneously. What makes a problem international is that often it cannot be dealt with effectively within the national arena. Costs and benefits spill into the external arena. These external effects are frequently so great that domestic goals cannot be accomplished without coordinated multilateral action.