Daniel Kaufmann has spent a lifetime studying corruption and brings to the subject a wealth of experience, both theoretical and practical. Indeed, few scholars have contributed more to enhance our understanding of the causes and consequences of corruption, how to assess its magnitude and how to formulate policies that will mitigate its impact or help reverse its deleterious effects. Drawing from his many years at the World Bank, his subsequent work as CEO for the Natural Resource Governance Institute and years of distinguished service advising governments and heads of major international organizations, Daniel delivers powerful insights, helping to expand our mental horizons.