The signature feature of twenty-first-century international cooperation is arguably not the
regime but the regime complex. A regime complex is an array of partially overlapping and …

There are over 250,000 international treaties that aim to foster global cooperation. But are
treaties actually helpful for addressing global challenges? This systematic field-wide …

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 …

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 …

Under what conditions do states withdraw from intergovernmental organizations (IGOs)?
Recent events such as Brexit, the US withdrawal from UNESCO, and US threats to withdraw …

Many international organizations (IOs) are currently under pressure and the demise of the
liberal international order is the talk of town. We theorize that institutional characteristics help …

Informal modes of cooperation are a central element of the complex institutional architecture
of contemporary global governance. Collectively and individually, the contributions to this …

Today, investor-state arbitration embodies the worst fears of those concerned about
runaway globalization-a far cry from its framers' intentions. Why did governments create a …

Artificial intelligence (AI) represents a technological upheaval with the potential to change
human society. Because of its transformative potential, AI is increasingly becoming subject …