Last month, I sat in a room in Lyon, France, alongside President Macron, health ministers, and global leaders for the G7 One Health Summit. One thing kept coming up in the room and across the two-day summit, panel after panel, in the corridors, and over dinner in Lyon and beyond: the link between development and security.

It is a link that I have been thinking about for years, and one that I believe is becoming the defining argument of our time for why development finance matters.