International law is clear: warring parties cannot kill civilians. It's a war crime. But there is one exception. An attacker can justify killing them if they’re being used as a shield for military objectives. This means a belligerent could kill a civilian and claim, after the fact, they were being used as shields by the enemy. Increasingly, that justification has been applied to neighbourhoods, districts, and even entire populations. IDEAS explores the long history of humans as shields and how this legal loophole has become a norm. 

Guests include Nicola Perugini, who teaches international relations at the University of Edinburgh. He is also co-author of Human Shields: A History of People in the Line of Fire. And Dr. Mimi Syed, an American emergency medicine physician who served two medical missions in Gaza in 2024.