Since the late 1980s the international relief community has seen its resources and personnel stressed beyond capacity by humanitarian crises--large-scale, man-made catastrophes such as the conflicts in Somalia, Bosnia, Rwanda, Chechnya, Zaire, and elsewhere. Waged within collapsing states, political and ethnic strife targets civilians, causes mass population dislocation and widespread human rights abuses, and impedes the efforts of relief organizations to respond effectively. Covering topics ranging from emergency public health measures to the psychological trauma of relief workers, this...