Commissioned by the Tony Blair Faith Foundation, this review takes extensive stock of what is known and what is not about the health work that faith-inspired organizations do, with a particular focus on Africa. It aims to fill these gaps in knowledge and research, as well as to contribute to formulating future research agendas. In addition to a full report, WFDD has also prepared a separate executive summary and background report to present the context in which this paper emerges and provide supporting research.