Stewardship is defined as “the careful and responsible management of something entrusted to one’s care”. It was originally applied in the health-care setting as a tool for optimizing antimicrobial use, termed “antimicrobial stewardship” (AMS). Stewardship has since been applied in the context of governance of the health sector as a whole, taking responsibility for the health and well-being of the population and guiding health systems at the national and global level.