International cooperation has stalled. From climate change and trade to nuclear nonproliferation and U.N. reform, macroeconomic rebalancing and development funding — and the list could go on — nearly every major initiative to solve the new century’s most pressing problems has ground to a standstill amid political gridlock, summit pageantry, and perfunctory news conferences. We’re trapped in a debilitating paradox. People around the world increasingly perceive their interconnectedness and interdependence. In principle, they recognize that this implies a need for closer international cooperation. Yet governance at all levels — public and private as well as global, national, and local — is struggling to adapt.