From Syrian civilians locked in iron cages to veterans joining peaceful indigenous water protectors at the Standing Rock Sioux Reservation, from Sri Lanka to Iraq and from Yemen to the United States, human beings have been used as shields for protection, coercion, or deterrence. Over the past decade, human shields have also appeared with increasing frequency in antinuclear struggles, civil and environmental protests, and even computer games. The phenomenon, however, is by no means a new...