International institutions such as treaties and organizations shape, and are shaped by, the
large web-like architecture of global governance. Yet we know little about what this …

This article asks three questions. Why is government organized across multiple levels?
Does efficiency determine the level at which decisions are made? Does efficiency frame …

International law, though formally neutral among regime types, has mainly been a product of
liberal democracies since World War II. In light of recent challenges to the liberal …

Why do international organizations (IOs) look so different, yet so similar? The possibilities
are diverse. Some international organizations have just a few member states, while others …

International-relations scholars tend to focus on the formation, design, and effects of
international organizations (IOs). However, the vitality of IOs varies tremendously. I argue …

Why do some countries fall apart, often along their ethnic fault lines, while others have held
together over decades and centuries, despite governing an equally diverse population …

This article summarizes the Correlates of War Intergovernmental Organizations (IGO)
Version 3.0 datasets. The new datasets include information about the population of IGOs in …

Once the exclusive preserve of member states, international organizations have become
increasingly open in recent decades. Now virtually all international organizations at some …

Recent research on economic sanctions has produced significant advances in our
theoretical and empirical understanding of the causes and effects of these phenomena. Our …

The Puzzle of Peace moves beyond defining peace as the absence of war and develops a
broader conceptualization and explanation for the increasing peacefulness of the …