Criticism that the development sector has not delivered in terms of eliminating extreme poverty, fast-tracking growth and preventing conflict, is neither new nor surprising. In fact, it may be the one thing that scholars, donors and practitioners agree on. While many of these concerns are valid, this book makes a case that the sector is closer to unlocking the gates to more effective and efficient development outcomes than is popularly believed. Specifically, it argues that by overturning a few myths, making better use of evidence and employing some different rules, practitioners, policy specialists and donors can foster the changes in the development architecture that are needed to reach the 10 percent of the world's population still living in extreme poverty. Engaging, provocative and clear sighted, the book provides insight into interventions around democratic governance, refugee response, counterterrorism, gender mainstreaming, environmental protection and private sector engagement. It is instructive reading for professionals across the development sector, think tanks and NGOs.