Mass litigation is on the reform agenda across Europe and the legislative landscape has changed impressively in recent years. Many aspects of collective redress litigation, particularly the comparative and international perspective, have been highlighted in various publications recently.1 Most of them have a focus on the political context such as whether to strengthen private or public enforcement of consumer and/or competition law or on questions raised in the context of contentious litigation, such as how to design procedural instruments effectively, or how to handle cross-border multiparty cases. The focal point of the contributions in this book is a different one. We take as a starting-point the observation that mass claims are a “nuisance” for both parties and courts. Preventing contentious litigation and encouraging parties to settle disputes is particularly important for mass claims. Therefore the contributions are about new ways of settling mass disputes. [...]