Abstract
Abstract This paper explores the networks that intergovernmental organizations (IGOs) create in the international system and explore how states relate to each other in such networks. It focuses in particular on the network of IGOs that act as creators of and agents for hard international law. We introduce new data that allows us to investigate which institutional traits and functions are most closely related to IGOs’ contribution to the implementation and enforcement of informal international law. We map out and explore the network of “highly legalized” IGOs for the years 1980–2005 as well as the affiliation networks emerging from states’ membership in such IGOs. Combining international relations theory with network theory, we raise novel hypotheses on the potential impact of highly legalized IGO networks on states’ conflict behavior and peace.
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