This book argues that international soft law is deeply political, shaping the winners and losers of globalization. Some observers focus on soft law's potential to solve problems and coordinate market participants. Voluntary Disruptions widens the discussion, shifting attention to the ways soft law provides new political resources to some groups while not to others and alters the sites of contestation and the actors who participate in them. Highlighting two mechanisms - legitimacy claims and arena expansion - the book explains how soft law, typically viewed as limited by its voluntary nature, disrupts and transforms the politics of economic governance.