CGD Policy Paper 215 outlines a proposal for reforming the financing of the international humanitarian system. The current system, which relies on voluntary donations, is inefficient and ineffective, as funding is unpredictable and allocated in a haphazard manner. The authors suggest three ways to make progress: implementing a multi-year common replenishment model for protracted and predictable crises, rebalancing country-level pooled mechanisms, and aligning core funding to agencies with agreed core functions. While the paper presents a compelling case for reform, it is unclear whether these proposals will be implemented in practice.