In the past three decades, levels of and contributors to global health aid have increased at an unprecedented pace. Development assistance for health—financial contributions from public and private institutions to low‐ and middle‐income countries to help improve health and health systems—nearly quintupled from 1990 to 2012 (from $5.7 billion to $28.1 billion). DAH is now provided by more than one hundred seventy major global health agencies and organizations, 15 percent of which are private entities (such as the Bill and Melinda Gates Foundation), other not‐for‐profit organizations, and public‐private partnerships. Governments are still the largest source for DAH. While increased DAH is essential and welcome, these system developments raise numerous ethical questions. Are the resources sustainable, and do expenditures target correct priorities? Who should decide, and how should these decisions be made?.