ODI's Development Progress aims to measure, understand and communicate where and how progress in development has happened. What are the latest methods we deploy to measure progress and why do they matter? What are the social, economic and political contexts that have facilitated and enabled progress in different countries? How do domestic and foreign resources contribute to financing progress? Building on phase one of this research - Development Progress: a library of stories - this four-year project explores these and other questions, with an aim to provide evidence for what’s worked and why over the past two decades.