The highly regarded business classic Good to Great1 found that one ingredient of highly successful businesses is pursuing and refining their core business year after year through incremental improvement and execution. So, too, in global public health. Yes, we have “game changers” in global health, to a degree, such as chlorhexidine for neonatal cord care, insecticide-treated bed nets, oral rehydration solution, contraceptive implants, pneumococcal vaccine, and even task shifting. But real success with these and dozens of other more modest interventions rests …