This book is based on systematic data collection among 26 universal health coverage (UHC) programs across 24 countries in the UHC studies. The main objective of this report is to document and analyze the experiences of 24 countries based on a systematic data collection that sought to capture in great detail how they are doing so. Thus the book aims to extend, on number of countries covered and detail of information collected the large number of case studies that have already enriched the global knowledge base on UHC. The UHC cube raises the real-world dilemma of which dimension to prioritize, given the inevitable trade-offs. The recent Lancet Global Commission 2035 analyzed alternative pathways to progressive universalism, and espoused support for two options. The first will make coverage available to the whole population but target the poor by prioritizing health interventions for diseases that disproportionately affect that group. The second will provide a larger package of interventions to the full population but with some patient copayment, from which poor people will be exempt.