The system of global governance is under serious challenge. Some scholars and practitioners have suggested that the time has come for the establishment of new multilateral forums that reflect 21st century realities. One option attracting increased attention in policy and academic circles is to create a Summit of the leaders of 20 nations (L20). This book explores whether the creation of an L20 is a feasible possibility for the international community. It offers thematic and geographic arguments in favour of the L20, with a particular emphasis on the larger role that it could play in bringing about reform of the global economic and financial systems.