A recent edition of the International Review of the Red Cross dedicated its content to examining a seemingly simple question: 'How does international humanitarian law develop?', touching upon the history of international humanitarian law (IHL), its current status and future prospects. In this week’s episode of Humanity in War, podcast host Elizabeth Rushing unpacks these questions with Dr. Cordula Droege, ICRC’s Chief Legal Officer and Head of the Legal Division, and Dr. Eirini Giorgou, a legal adviser in the ICRC’s Arms and Conduct of Hostilities Unit specializing, among other topics, on explosive weapons in populated areas.