Part 6, “Prevention of War and Its Health Consequences,” broadens the reader's view from the particulars of war to ways in which public health can first ameliorate and then contribute to the prevention of war. In chapter 20, Rez, Anderson, and Mercy offer a useful framework for considering the role of public health. Relevant aspects of international law are well reviewed in chapter 21 by Weiss, who describes the rationale for various pivotal United Nations conventions underpinning current approaches to control and ameliorate the impact of conflict on civilians. In “The Role of Nongovernmental Organizations,” Loretz samples a few specific international nongovernmental organizations (NGOs) to illustrate their historic and current role. Given the rapid expansion in the number, size, and growing pivotal role of international NGOs, I would have appreciated an expanded chapter addressing some of the current issues and controversies in the sector, including topics such as the pluses and minuses of international NGOs being put in the position of comprising the health infrastructure in areas with prolonged postconflict situations (eg, Democratic Republic of the Congo). Since so much of the resources of governments, the United Nations, and foundations are now focusing on this sector, the book could have more fully addressed issues of “neutrality” as well as questions such as the role of humanitarian assistance vs peacekeeping or military personnel doing community development.