This report explores the critical uncertainties underlying the future international roles of the euro, the dollar and the yuan and how different responses to them by policy makers in each of these currency areas may create challenging scenarios for the international monetary system in 2030. Analysing such alternative developments is critical to both public and private sector decision-makers for building robust and resilient strategies - not only to anticipate and prepare for possible future shifts that may affect them, but also to help stakeholders focus on what steps must be taken today to work towards a desired outcome.